The watch is called a precision mechanical timing instrument, which relies on the operation of parts such as gears and springs inside the movement. As a mechanical component, friction is sure to occur during use, and friction causes wear. Although most of the timepieces now use artificial rubies and lubricating oil inside the movement to reduce the friction of the gears, springs and escapes, in the long-term use, as the lubricating oil dries and evaporates, its friction will Increasingly large, which in turn accelerates the wear of the components, which may eventually lead to deformation of the parts and a decrease in travel time accuracy. Therefore, it is necessary to clean and refuel to ensure the accuracy of travel time. The movement of the mechanical watch also requires a safe and stable external environment, and the case acts as an effective barrier. However, as time passes, the rubber ring for waterproofing between the cases will age and the waterproof paste will fail, making it difficult to effectively isolate moisture and dust. The damage of moisture and dust to the movement is very, very large, so it is necessary to replace the waterproof ring to detect water resistance. In addition, in daily use, the environment in which the friends of the table are used is different, and it will definitely require an extremely harsh environment. Such as high temperature, strong magnetic, impact, etc., these may cause invisible internal damage to the naked eye, if not timely repair and maintenance, it may affect the watch's travel accuracy, and even cause irreparable permanent damage. In addition, the internal parts of the movement have objective service life, such as spring, spring wire, gear shaft and other components. After long-term use, metal fatigue and wear will occur, and spare parts can be replaced during maintenance. Therefore, in order for everyone's watches to last for a long time, as long as it is a mechanical watch, it must be regularly maintained! As long as it is a mechanical watch, it must be regularly maintained! As long as it is a mechanical watch, it must be regularly maintained! Just like a woman wants to buy skin care products, the car needs to be maintained! Failure to maintain will result in a beautiful short period and a shorter period of use. Although some brands (such as Cartier) have proposed a maintenance-free design, they are actually concept products. The 999999999 watches on the market require regular maintenance. How long does it take to maintain it? For the maintenance of mechanical watches, there is actually no constant time standard! Because of the structure, performance, raw materials and the wearing habits of each watch. The wearing environment is different, so we can only give a rough reference range. Generally speaking: every five years to do a comprehensive maintenance, commonly known as "big health." Do basic maintenance every three years. For example, a diving watch with special use is preferably subjected to a waterproof inspection every year and a conditional annual degaussing treatment. It is worth noting that the time period mentioned above was taken without any problems in the watch. Once the watch receives an impact or accidentally enters the water. It must be sent to the repair point immediately and processed according to the specific situation!