According to my own experience, it may take two or three years for ordinary people to learn mechanical watches, because different types of watches (such as manual and automatic watches) and different styles of watches (men's and women's) have very different structures, and watches made in different countries have different structures. It is not easy to really know how to disassemble and assemble so many types of watches. There are more than 100 parts in another automatic watch, and each part may break down. You should learn to judge failure. Repairing (or replacing parts) on this basis requires rich experience and superb technology (such as balance spring) to eliminate the faults of individual parts. This troubleshooting technology can not be solved overnight, and it needs to be explored and improved in long-term maintenance practice. Of course, the time to master the skills of repairing watches is also related to the understanding of eight people. A talented person may work hard for a year. As for tuition, the master's degree is generally not too high. What the master values is having a good and clever apprentice who can help the master share the pressure.