Want to learn how to make and install broken bridge doors and windows, is there any special training class to learn?

There is no such systematic training course for doors and windows. You can find some technicians of intermediary companies (the salary is definitely high), and then find some people in the package workshop (I don't know if you have this word there) to do a project for your people to study hard; Then find the acting director. For example, your company used to do real estate, but now it wants to set up a door and window factory. Then, you have to hire a factory director, who will be fully responsible for the technical and business aspects of the door and window factory and pay dividends to the factory director at the end of the year. You basically don't have to worry about finding a good factory director. He can find big workers, coolies, technicians, etc. Through contacts, let him rest assured that he still has money left, because it must be for the dividend at the end of the year. If the profit is high this year, there will definitely be more dividends at the end of the year. I suggest you find such a factory director. (I hope to use TAT! )