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Precautions for using fully automatic mechanical watches: 1、 Non professionals are advised not to open the back cover to prevent damage. 2、 After adjusting the watch, be sure to push the handle back to the bottom. 3、 Strap length adjustment: slight Adjust the position of the movable buckle, and make significant adjustments by disassembling and assembling the strap and beads. 4、 Mechanical automatic watches may travel slower when the wearer is less active, which is a normal phenomenon. When using, please rotate the handle 20-30 times to start winding the mainspring. Precautions for using manual mechanical watches: 1、 Clocking up once every 24 hours to ensure sufficient power for jumping from time to day. When winding, hold the watch upwards at 12 o'clock and rotate it clockwise to fully wind it up. Be careful not to forcefully rotate the watch handle after fully winding the mainspring, in order to avoid breaking the winding stem or mainspring. 2、 To quickly adjust the calendar, you need to pull out the watch handle, align the hour and minute hands with 12 o'clock, turn them counterclockwise for 3 to 4 hours, and then turn them clockwise back to 12 o'clock. The calendar will be quickly adjusted by one day. Pulling out the watch handle and rotating the hour and minute hands clockwise twice can also make the calendar jump forward by one day. 3、 The length of the watch strap can be adjusted slightly by adjusting the position of the movable buckle, while a large adjustment requires disassembling and assembling the watch strap shaft. 4、 Try not to come into contact with water, steam, high temperatures, and corrosive gases during use to avoid unnecessary damage to the movement and appearance. At the same time, avoid strong vibrations and stay away from strong magnetic field environments. 5、 Do not open the back cover by yourself. Precautions for using quartz watches: 1、 Non professionals are advised not to open the back cover to prevent damage. 2、 After adjusting the watch, be sure to push the handle back to the bottom. 3、 Strap length adjustment: Small adjustments can be made to the position of the movable buckle, while large adjustments require disassembly and assembly of the strap particles. This statement is only applicable to ordinary quartz watches and mechanical watches, and does not include watches with special movements. 1. Battery When the second hand of a quartz watch jumps or stops every few seconds and the battery runs out, the battery should be replaced in a timely manner to avoid leaving the plating tank without electricity in the watch for a long time and causing damage to the movement. 2. Temperature The normal working environment temperature for quartz watches is -5 degrees to 50 degrees. Do not place the watch in an environment that is too high or too low (such as taking a sauna or soaking in hot springs), as it may affect the accuracy of the watch's time and the lifespan of the battery. 3. Fully automatic mechanical watch A fully automatic mechanical watch must be automatically wound by the movement of the wearer's arm, so it must be worn for more than eight hours a day to ensure accurate timing. If the wearing time during the day is not enough, resulting in insufficient walking time, it is recommended to shake the watch horizontally for one minute when removing it at night to supplement the winding. 4. Waterproof Waterproof watches have a waterproof effect in daily life, but they cannot be worn for swimming or diving. It is recommended not to wear them for bathing to avoid short circuiting or rusting of the movement coil after water ingress, which may affect the watch's timekeeping. 5. Shock and vibration Watches made of high hardness materials (such as hard alloys, ceramics, blue, etc.) have poor impact resistance and should be avoided from falling, colliding, and rubbing against high hardness objects. 6. Magnetic watches should be kept away from objects with strong magnetic fields such as televisions, magnets, and speakers to avoid damage to the movement caused by the magnetic field and affect the accuracy of the watch's timekeeping. 7. Chemicals The watch should avoid contact with various solvents (such as alcohol and gasoline), mercury, cosmetics, sprays, adhesives, detergents, paints and other corrosive liquids or gases, so as to avoid discoloration, deterioration or damage caused by erosion of the surface of the case and strap. 8. Care carefully Dust, moisture, and dampness accumulated on the watch case and strap may cause rusting. For this reason, the watch should be regularly cleaned with a soft dry cloth. Take care of your watch carefully and use it correctly according to the instructions in the user manual.