This article provides a detailed overview of the key processes and considerations in electroplating, chemical plating, and hot air leveling for Flexible Printed Circuits (FPC). It highlights the importance of pre-treatment in electroplating for maintaining FPC performance, the challenges in controlling plating thickness, and issues related to post-plating stains. Additionally, the article discusses the application of chemical plating when FPC conductors cannot serve as electrodes and the quality concerns that may arise. Finally, it examines the use of hot air leveling on FPCs, focusing on adhesion strength and moisture resistance. Through this article, readers will gain a deeper understanding of the common challenges in FPC manufacturing and their solutions.Hope for the future Flex PCB manufacturer It can achieve rapid and stable development and serve social development and people’s needs well. https://gekunflex.com/

　　

　　FPC manufacturer

　　

　　FPC manufacturer

　　

　　FPC Plating Process

　　

　　1. Pre-treatment for FPC Electroplating

　　

　　After the flexible printed circuit (FPC) undergoes the coating process, the exposed copper conductors may be contaminated by adhesives or ink. Additionally, oxidation and discoloration caused by high-temperature processes can occur. To ensure good adhesion of the plating, these contaminants and oxidation layers must be removed, leaving the conductor surface clean.

　　

　　However, some contaminants are strongly bonded to the copper conductor, making it difficult to remove them with weak cleaning agents. Strong alkaline abrasives and brushing are typically used for this treatment. Since the adhesive used in the cover layer is often epoxy-based, which is not resistant to alkaline agents, this can weaken bonding strength. Although not immediately apparent, during the electroplating process, the plating solution may seep into the edges of the cover layer, and in severe cases, cause delamination of the cover layer.

　　

　　At the final soldering stage, solder might seep beneath the cover layer. Therefore, the pre-treatment cleaning process has a significant impact on the basic characteristics of the FPC, making it essential to pay close attention to the processing conditions.

　　

　　2. Thickness of FPC Electroplating

　　

　　The deposition rate of electroplating metal is directly related to the intensity of the electric field, which varies depending on the shape of the circuit and the position of the electrodes. Generally, the thinner the conductor line and the sharper the terminal end, the stronger the electric field, leading to a thicker plating in those areas.

　　

　　In FPC applications, there are often wide differences in the width of conductor lines within the same circuit, resulting in uneven plating thickness. To prevent this, auxiliary cathode patterns are added around the circuit to absorb uneven current distribution across the plating pattern, ensuring uniform plating thickness across all areas.

　　

　　Electrode structure is key here. A compromise approach can be adopted, where stricter standards apply to areas requiring high plating uniformity, such as molten solder (lead-tin) and gold plating for metal wire bonding, while areas requiring plating for general corrosion protection may have more relaxed thickness requirements.

　　

　　FPC manufacturer

　　

　　3. Contamination of FPC Electroplating

　　

　　Immediately after electroplating, the plated surface may appear fine, but stains, dirt, or discoloration can appear over time. Often, these issues are not detected during factory inspections but are discovered during customer acceptance tests. This happens when the plated surface is not adequately rinsed, leaving residual plating solution, which reacts chemically over time, especially on the flexible surface due to its softness and uneven texture.

　　

　　To prevent this, thorough rinsing and drying are essential. A high-temperature thermal aging test can verify whether rinsing was sufficient.

　　

　　FPC Chemical Plating

　　

　　When the conductor to be plated is isolated and cannot serve as an electrode, chemical plating must be used. Chemical plating solutions are highly reactive, and a common example is chemical gold plating. The chemical gold plating solution is an alkaline solution with a very high pH value.

　　

　　When using this process, it is easy for the plating solution to seep beneath the cover layer, especially if the lamination quality control is poor, leading to weak adhesion. Displacement reactions in chemical plating exacerbate this problem, making it difficult to achieve ideal plating conditions.

　　

　　FPC Hot Air Leveling (HASL)

　　

　　Hot air leveling was originally developed for rigid printed circuit boards (PCBs) to coat them with lead-tin. However, this technique has been applied to FPCs due to its simplicity. Hot air leveling involves immersing the board vertically into molten lead-tin and blowing off excess solder with hot air.

　　

　　These conditions are quite harsh for FPCs. Without special measures, FPCs cannot be immersed in molten solder. To address this, FPCs must be clamped between titanium-steel meshes before immersion. Additionally, the surface of the FPC must be cleaned and coated with flux beforehand.

　　

　　Due to the harsh nature of the hot air leveling process, solder may seep beneath the edges of the cover layer, especially if the bonding strength between the cover layer and the copper foil is weak. Since polyimide films are prone to moisture absorption, moisture can evaporate suddenly under the heat, causing blistering or even delamination of the cover layer. Therefore, drying and moisture control must be performed before FPC hot air leveling.

　　

　　FPC manufacturer

　　

　　FPC manufacturer

　　

　　Gekun is a leading manufacturer specializing in high-quality Flexible Printed Circuits (FPC). With years of experience in the industry, Gekun provides advanced FPC solutions tailored to various industries, including telecommunications, medical devices, automotive, and consumer electronics. Their manufacturing process emphasizes precision, reliability, and innovation, ensuring excellent performance and durability. For businesses looking for custom FPC designs or mass production, Gekun stands out as a trusted partner, offering both competitive pricing and cutting-edge technology.

　　

　　For more information on Gekun¨s FPC manufacturing capabilities, you can visit their official website or contact their team for specific inquiries.

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Cairo, July 14 (Reporter Zhang Meng) News from Khartoum: According to a report by the Sudan Tribune on the 14th, the Sudanese Rapid Support Force opened fire on multiple vehicles in the Rahid area of Northern Kordofan State in the western part of the country on the 13th, killing 23 civilians.

The report quoted a statement issued by local Sudanese organizations as saying that a unit affiliated with the Sudanese Rapid Support Force intercepted a number of vehicles heading for shopping from nearby villages in the city of Umm Ruwaba in the Rahad area and fired at the people inside, resulting in 23 deaths and many others injured.

The Sudanese Rapid Support Force has not yet responded.

On April 15, 2023, an armed conflict broke out between the Sudanese Armed Forces and the Sudanese Rapid Support Force in the capital Khartoum, and the fighting subsequently spread to other areas. The armed conflict that lasted for more than a year has killed approximately 1.87 million people in Sudan and displaced more than 9.4 million people.

　　Have you ever been awakened by the embarrassing moment that Amy’s watch on your wrist suddenly slipped in the morning? Yes, you are not mistaken, that is, the Amy watch that appears so elegant and accurate in your daily life will actually “slip silk”! This is not just an accident, but more like a silent humorous drama, which makes people laugh and cry. So, in the face of such a situation, what should we do? Don’t worry, follow me to explore the solution!So, rolex sky dweller oysterflex On the contrary, there is still a lot of room to play. https://finewatchcare.com/products/fwc-for-rolex-126600-0001-watch-protection-film?_pos=1&_sid=fe2c3ffcd&_ss=r&variant=47004161638687

　　

　　First of all, understand the truth of “silky”

　　

　　The word “silky thread” sounds a bit abstract, but actually refers to the relative sliding between the strap and the clasp. This usually happens when the strap material is soft, the clasp design is not tight enough, or the strap is worn for a long time. Imagine, it’s like wearing a soft scarf and being blown away by a breeze inadvertently.

　　

　　Diagnostic steps: self-check and help

　　

　　Once the phenomenon of “wire slipping” is found, the first step is self-diagnosis-check whether the strap has worn to a certain extent, whether the clasp is loose or whether there is any foreign body stuck. If the problem lies with yourself (for example, too much sweat makes the wrist strap greasy), you may need to adjust your wearing habits or choose a watch with a more sweat-proof material.

　　

　　If self-diagnosis can’t solve the problem, you might as well seek professional help. It is a good choice to go to the local watch repair shop for inspection and maintenance. Remember to bring your Amy watch and any accessories that may affect the problem (such as a spare strap), so that you can find the problem more accurately.

　　

　　Maintenance suggestion: DIY and professional service

　　

　　You can try to solve the slight “silky” problem yourself. For example, use some small tools (such as a small screwdriver or a special clock tool) to adjust the tightness of the watch buckle. Of course, before any operation, please make sure to understand the basic operation steps and safety knowledge.

　　

　　For more complicated situations, it is recommended to seek professional maintenance services. Professional watchmakers will use special equipment and tools to conduct a comprehensive inspection and repair of your Amy watch. They can not only accurately judge the problem, but also have experience in repairing all kinds of complex mechanical failures.

　　

　　Preventive measures: daily maintenance and selection

　　

　　In addition to solving the problems, daily maintenance is also the key to prevent the phenomenon of “silk slipping”. Cleaning the watch regularly, avoiding long-term contact with water or chemicals, and choosing a watch style that suits your wrist size and activity habits are all part of the preventive measures.

　　

　　Generally speaking, although “Amy Watch Slipping Wire” has brought embarrassment and inconvenience to some extent, through correct diagnosis, appropriate solutions and daily maintenance measures, we can effectively deal with this situation and keep our watch in the best condition.

　　

　　So, the next time you encounter such an episode, please keep a calm and optimistic attitude-after all, in this world full of small surprises, the “silky” Amy watch is also a unique memory!

　　Space exploration has always been an important field of human exploration, which can not only help us better understand the origin and evolution of the universe, but also provide new breakthroughs for human scientific and technological development. The following are the scientific emphases of space exploration: 1. Interstellar exploration: Humans have been exploring interstellar space outside the solar system to understand the origin and evolution of the universe. At present, humans have launched a number of detectors, such as voyager 1 and No.2, Pioneer No.10, etc. They have detected interstellar space outside the solar system and sent back a lot of data. In the future, mankind will continue to launch more interstellar probes to understand the mysteries of the universe.in fact 太空探索 It is more and more welcomed by our customers, and its market performance is gradually improving. https://www.zhanmeng.net/

　　

　　2. Planetary exploration: Another important field of space exploration is planetary exploration. Humans have sent probes to many planets and satellites in the solar system, such as Mars probe, Venus probe and Jupiter probe, which have provided us with a lot of information about planets and satellites. In the future, mankind will continue to launch more planetary probes to gain a deeper understanding of the planets and satellites in the solar system.

　　

　　3. Solar physics: The sun is the center of the solar system, which has a great influence on the earth and other planets. Solar physics studies the activities and behaviors of the sun to understand its influence on the earth and other planets. At present, humans have sent many detectors to the sun, such as solar observation satellites and solar dynamics observation satellites, which have provided us with a lot of information about solar activities and behaviors.

　　

　　4. Space astronomy: Space exploration can also help us better understand the origin and evolution of the universe. Space telescopes can observe celestial bodies far away from the earth, such as galaxies, nebulae and stars, which provide us with a lot of cosmic information. At present, humans have launched several space telescopes, such as Hubble Space Telescope and Spitzer Space Telescope, which have provided us with a lot of cosmic information.

　　

　　In a word, space exploration is an important field of human exploration, which can help us better understand the origin and evolution of the universe and provide new breakthroughs for human scientific and technological development. In the future, mankind will continue to launch more detectors and space telescopes to gain a deeper understanding of the mysteries of the universe.

　　IntroductionIf you want to make a big difference in the market, flexible PCB It is necessary to intensify the upgrading of products on the original basis in order to meet the consumption needs of consumers. https://gekunflex.com/

　　

　　Rigid-flex PCBs have revolutionized the electronics industry, offering a blend of the durability of rigid boards and the flexibility of flexible circuits. While these hybrid boards provide numerous advantages！such as reduced space and improved reliability！their manufacturing and application come with a range of challenges. In this article, we will explore the common challenges associated with rigid-flex PCB technology and provide practical solutions to address them.

　　

　　Table of Contents hide

　　

　　1 Challenges and Solutions for Rigid-Flex PCB Technology

　　

　　1.1 Introduction

　　

　　1.2 1. Design Complexity

　　

　　1.2.1 Challenge:

　　

　　1.2.2 Solution:

　　

　　1.3 2. Material Selection

　　

　　1.3.1 Challenge:

　　

　　1.3.2 Solution:

　　

　　1.4 3. Manufacturing Precision

　　

　　1.4.1 Challenge:

　　

　　1.4.2 Solution:

　　

　　1.5 4. Thermal Management

　　

　　1.5.1 Challenge:

　　

　　1.5.2 Solution:

　　

　　1.6 5. Testing and Inspection

　　

　　1.6.1 Challenge:

　　

　　1.6.2 Solution:

　　

　　1.7 6. Cost Factors

　　

　　1.7.1 Challenge:

　　

　　1.7.2 Solution:

　　

　　1.8 Solutions for Common Rigid-Flex PCB Challenges

　　

　　1.9 Conclusion

　　

　　1. Design Complexity

　　

　　Challenge:

　　

　　Rigid-flex PCBs require intricate designs to integrate both rigid and flexible parts effectively. The complexity lies in managing signal integrity, bending reliability, and the interaction between different layers. Moreover, ensuring that the flexible sections do not interfere with the functionality of the rigid parts is crucial.

　　

　　Solution:

　　

　　Collaborative Design Approach:Involve both the design and manufacturing teams early in the project to optimize the layout and mitigate risks.

　　

　　Design Automation Tools:Use advanced design software that provides tools for simulating signal flow and stress analysis in flex zones, ensuring better layout design for enhanced performance.

　　

　　Pre-Layout Simulation:Conduct pre-layout simulations to predict potential design issues, allowing for early adjustments.

　　

　　Rigid-Flex PCB technology

　　

　　Rigid-Flex PCB technology

　　

　　2. Material Selection

　　

　　Challenge:

　　

　　Selecting appropriate materials for rigid-flex PCBs is vital to maintaining durability and performance. Issues arise when materials selected for the rigid sections are incompatible with those used in the flexible areas, leading to issues like delamination and reduced flexibility.

　　

　　Solution:

　　

　　Balanced Material Selection:Choose materials that work well in both rigid and flexible sections, such as polyimide for the flex parts and FR-4 for rigid areas.

　　

　　Consider Environmental Conditions:Ensure materials are chosen based on the environmental conditions the PCB will face, such as temperature fluctuations, moisture, and vibration.

　　

　　Material Compatibility Testing:Perform thorough material compatibility testing to ensure that materials used in different layers adhere properly and maintain functionality.

　　

　　3. Manufacturing Precision

　　

　　Challenge:

　　

　　Manufacturing rigid-flex PCBs requires extreme precision to avoid misalignment between the rigid and flexible layers, which can lead to performance issues or complete circuit failure. Achieving the necessary precision during layer stacking and lamination is a significant challenge.

　　

　　Solution:

　　

　　Advanced Manufacturing Equipment:Invest in precision manufacturing equipment capable of handling the unique requirements of rigid-flex PCBs, including accurate layer stacking and alignment.

　　

　　Controlled Lamination Process:Ensure strict control over lamination conditions to prevent misalignment and warping, particularly in multi-layer designs.

　　

　　Quality Control Protocols:Implement comprehensive quality control protocols throughout the manufacturing process, including automated optical inspection (AOI) and X-ray inspection to ensure alignment.

　　

　　Rigid-Flex PCB technology

　　

　　Rigid-Flex PCB technology

　　

　　4. Thermal Management

　　

　　Challenge:

　　

　　Thermal management is critical in rigid-flex PCBs, especially in high-performance applications where heat dissipation is a concern. Poor thermal management can lead to overheating, reducing the lifespan of the board and components.

　　

　　Solution:

　　

　　Heat Dissipation Materials:Incorporate heat dissipation materials such as thermal vias or copper planes into the rigid sections to manage heat effectively.

　　

　　Design for Ventilation:Ensure adequate ventilation or thermal pathways in the PCB design to allow heat to dissipate naturally.

　　

　　Thermal Simulations:Use thermal simulation software during the design phase to predict hot spots and design effective cooling strategies.

　　

　　5. Testing and Inspection

　　

　　Challenge:

　　

　　Testing rigid-flex PCBs can be complex due to the multi-layered structure and the combination of rigid and flexible elements. Traditional testing methods may not detect issues specific to the flex areas or the connection between rigid and flex parts.

　　

　　Solution:

　　

　　Customized Testing Procedures:Develop customized testing procedures that address both the rigid and flexible sections. For example, use specialized testing methods like dynamic flex testing for the flexible areas.

　　

　　Automated Testing Tools:Use automated testing tools, including flying probe testers and boundary scan technologies, to ensure that even the smallest defects are detected.

　　

　　Regular Prototyping:Regularly create prototypes to test and identify issues early before moving on to full-scale production.

　　

　　Rigid-Flex PCB technologyRigid-Flex PCB technology

　　

　　6. Cost Factors

　　

　　Challenge:

　　

　　Rigid-flex PCBs are often more expensive to design and manufacture compared to traditional rigid PCBs or flexible circuits. The cost increases due to material selection, intricate design, and precision manufacturing.

　　

　　Solution:

　　

　　Design Optimization:Optimize the design to reduce material wastage and manufacturing complexity. For example, use a minimal number of layers or reduce the number of vias.

　　

　　Volume Production:Leverage economies of scale by producing in larger quantities, which can help reduce the per-unit cost.

　　

　　Supplier Collaboration:Work closely with suppliers like Gekunflex to source high-quality materials at competitive prices, ensuring cost efficiency without compromising quality.

　　

　　Solutions for Common Rigid-Flex PCB Challenges

　　

　　Addressing the challenges associated with rigid-flex PCBs requires a multi-faceted approach. By focusing on design optimization, careful material selection, precision in manufacturing, and effective thermal management, companies can overcome many of the difficulties these hybrid boards present. Additionally, thorough testing and cost management strategies can ensure the reliability and affordability of rigid-flex PCBs for various applications.

　　

　　At Gekunflex, we specialize in providing tailored solutions for all your rigid-flex PCB needs, ensuring that your products meet the highest standards of quality and performance. By collaborating with a trusted supplier, you can overcome the challenges associated with rigid-flex technology and achieve success in your projects.

　　

　　Conclusion

　　

　　Rigid-flex PCBs offer numerous advantages, but they also come with unique challenges. By employing the solutions discussed in this article！ranging from design improvements to cost management！manufacturers can enhance the reliability and performance of their rigid-flex PCB designs. Whether you¨re tackling complex designs or seeking to improve material compatibility, the key lies in optimizing every aspect of the process.

　　

　　For more information on rigid-flex PCBs and how we at Gekunflex can assist you in overcoming these challenges, contact our team of experts today.

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On May 13, Singapore Prime Minister Lee Hsien Loong submitted his resignation to President Shandaman.

According to information announced by the Prime Minister’s Office of Singapore on April 15, Lee Hsien Loong will step down on May 15, and Deputy Prime Minister and Minister of Finance Wong Xuncai will be sworn in as the new Prime Minister at the Presidential Palace on the same day.

Huang Xuncai also previously stated that Lee Hsien Loong will remain in the cabinet as Senior Minister after stepping down on May 15.

Lee Hsien Loong, 72, entered politics in the 1980s and served as the Second Minister of Defense, Minister of Trade and Industry, Deputy Prime Minister and Minister of Finance of Singapore. He took office as Prime Minister of Singapore in August 2004 and has been re-elected to this day. (General reporter Liu Chang and reporter Hai Yue)

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Bangkok, July 16 (Reporter Chen Qianci Gao Bo) Six foreigners were found dead in the hotel room in a well-known hotel in Bangkok, the capital of Thailand, on the 16th. Police said the exact cause of death remains to be investigated.

Thai Prime Minister Saita said at a press conference that night that the six dead, including four Vietnamese and two Vietnam-Americans, died about 24 hours, and there were no signs of conflict or fighting at the scene. He requested that an investigation be launched into the case as soon as possible.

Bangkok City Police Commissioner Tidi said at a press conference that night that the six victims were three men and three women. There were traces of drinking tea or coffee in the room, and the residue in the cup had been sent for inspection. The police initially concluded that suicide was ruled out and the exact cause of death was pending further investigation.

Previously, several Thai media first reported that a shooting incident occurred at the hotel, and later corrected it to the death of 6 people or cyanide poisoning. (Participating reporter: Lin Hao)

　　Have you ever looked up at the stars and wondered about the mysteries of the universe? There are countless unknowns and surprises in the vast universe. Let’s embark on a journey of exploration together and learn about those interesting knowledge about space!In combination with these conditions, 机械化功能付费出名 It can still let us see good development and bring fresh vitality to the whole market. https://www.zhanmeng.net/

　　

　　1. What color is the sunset on Mars?

　　

　　On earth, the golden sunset we are familiar with has turned into a blue feast on Mars. This is because the atmosphere of Mars is thin and rich in dust. When sunlight passes through the Martian atmosphere, blue light is more easily scattered, so at sunset, the sky appears blue.

　　

　　2. How do astronauts weigh themselves in space?

　　

　　In the weightless environment, traditional weighing scale can’t work. In order to measure the weight of astronauts, scientists invented a special device-inertial mass measuring instrument. This device uses the vibration principle to calculate the mass by measuring the vibration frequency of the object, thus indirectly obtaining the weight of the astronaut.

　　

　　3. How cold is the coldest place in space?

　　

　　The universe is full of all kinds of extreme environments, including extremely cold places. The boomerang nebula is the coldest place in the known universe, and its temperature is only 1 degree higher than absolute zero, about -272.15 degrees Celsius. At this temperature, almost all substances stop moving.

　　

　　4. What is a black hole?

　　

　　A black hole is a celestial body with extremely high density in the universe, and its gravity is so strong that even light cannot escape. When a star collapses to the extreme, it may form a black hole. Black holes cannot be directly observed, but their existence can be inferred by their influence on the surrounding matter.

　　

　　5. How do astronauts sleep in space?

　　

　　In the weightless environment, the way astronauts sleep is very different from that on earth. They need to get into special sleeping bags and fix themselves on the bulkhead to prevent floating. Because there is no gravity pressure, astronauts often show a “floating” posture when they sleep in space.

　　

　　6. How fast is the International Space Station?

　　

　　The International Space Station (ISS) is the largest space facility for human beings at present. It flies around the earth at a speed of about 28,000 kilometers per hour. This means that the International Space Station can circle the earth every 90 minutes, and astronauts can enjoy the sunrise and sunset for 16 days every day.

　　

　　7. Is there any sound in space?

　　

　　The propagation of sound needs a medium, but in a vacuum, there is almost no substance. Therefore, there is silence in space. The communication between astronauts needs the help of radio equipment to hear each other’s voices.

　　

　　8. Why do the stars twinkle?

　　

　　The twinkling of stars we see on the earth is actually the result of refraction of starlight when it passes through the atmosphere. Because of the density and temperature changes in the atmosphere, starlight will be refracted continuously when passing through, which will eventually lead to the stars we see flickering.

　　

　　9. What is the significance of human exploration of space?

　　

　　Exploring space is human’s curiosity and pursuit of the unknown world. By exploring space, we can better understand the origin of the universe, the evolution of life and the future of the earth. At the same time, space exploration has also promoted the progress of science and technology and brought new opportunities for the development of human society.

　　

　　10. How to participate in space exploration?

　　

　　Are you also full of longing for space? Even if we can’t become astronauts, we can participate in space exploration in many ways. Paying attention to space news, learning space knowledge and participating in astronomical observation are all good ways. Let’s look up at the stars and explore the mysteries of the universe!

　　If you are a big fan of Zenith watches, you may encounter a headache: how to adjust the strap length of the watch? Don’t worry, let’s reveal this “secret weapon” today, so that you can easily master this little skill and make your watch fit your wrist perfectly, whether it’s refreshing in summer or warm in winter.In the eyes of industry experts, 210.30.42.20.04.001 Indeed, it has great development potential, which makes many investors more interested. https://finewatchcare.com/collections/omega-watch-protection-films/products/fwc-for-omega-210-32-42-20-03-001-watch-protection-film

　　

　　Step 1: Know your opponent.

　　

　　First of all, you need to know the real strength in your hand. Watch straps can be roughly divided into two types: metal chain and leather belt. The adjustment of metal chain is relatively simple, while the adjustment of leather belt requires more patience and care. Knowing the basic information of the opponent, the next step is the actual operation.

　　

　　Step 2: Easy adjustment of metal chain

　　

　　For a metal chain strap, it is as simple as playing Transformers. First, find a rotatable screw on the strap. This screw is the key to the whole adjustment process. Turn the screw gently, and you will feel that the strap is gradually shortening or lengthening. Remember to do what you can every time you adjust, and don’t use too much force to loosen or damage the screws.

　　

　　Step 3: Exquisite operation of leather belt

　　

　　The adjustment of cortical belt requires more care and skill. First, find the small holes or retaining rings on both sides of the clasp. These holes or retaining rings are usually designed as adjustable-size structures. Choose the appropriate hole position or buckle position according to the size of your wrist, and fix the leather belt through the corresponding hole or buckle.

　　

　　Step 4: Find the balance point.

　　

　　After adjusting the length of the strap, please make sure that the watch is neither loose nor tight on the wrist. Too tight may cause wrist discomfort and even skin wear; Too loose will easily cause the watch to fall off. Finding that comfortable and stable balance point is the key.

　　

　　Step 5: Make the tips public.

　　

　　1. Regular inspection: regularly check whether the strap is worn or cracked, and replace it with a new watch in time to ensure safety and beauty.

　　

　　2. Cleaning and maintenance: gently wipe the cortex with a soft cloth to avoid contact with water and chemicals.

　　

　　3. Professional service: If you encounter problems that are difficult to solve, you may wish to send your watch to a professional repair shop for inspection and adjustment.

　　

　　Remember, “details determine success or failure”, pay more attention to and care for your powerful watch, and it will reward you with precise time and elegant demeanor.

　　

　　Through the above steps, you not only learned how to adjust the strap length of the watch, but also learned some tips for daily maintenance. I hope this knowledge can make your watch accompany you for a longer time and spend every day more elegantly!

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Mexico City, March 18 (Reporters Wang Zhiying and He Yixuan) Port-au-Prince News: According to Haiti media reports on the 18th, Haiti gangs attacked two communities on the outskirts of the capital Port-au-Prince that day, killing at least a dozen people.

Reports said gangs attacked homes in two communities in Labule and Tomasin, a suburb of Port-au-Prince, that day. Witnesses said at least a dozen bodies were taken away by ambulances and many residents were forced to flee.

Haiti’s electricity department announced on the 18th that four substations and the Valle power station in the Port-au-Prince area were destroyed by criminal groups and have completely stopped operating, resulting in power outages in most parts of the capital.

The security situation in Haiti has continued to deteriorate recently. Starting from February 29 this year, several gangs in Haiti have attacked public facilities such as police stations and international airports in Port-au-Prince, demanding that Prime Minister Ariel Henry step down. On the evening of March 11, Henry announced that the Haiti government would resign after the establishment of the Transitional Presidential Council.