I wonder if you want to make aluminum alloy doors and windows, too. It's not difficult to do this job, but you can't teach yourself. The equipment is very simple, just an aluminum saw, an impact drill and a pistol drill. And some commonly used hardware tools such as screwdrivers. About 12000 yuan, because the molding machine is pressed by aluminum wholesale dealers. You give him the measured size, and he can process aluminum. You can pull it back and install it in glass. You can't just make aluminum alloy. You'd better learn sub-arc welding. Welding stainless steel. I also know how to make sliding doors, screens and the like. This business is nothing new. If the direct business may be profitable, if it is subcontracted, it means earning personal salary. Therefore, if you are a diplomat and can run your own business, then you will have a source of business. The income will be more stable. To sum up, if you are a hard worker and have some diplomatic skills, you can try it if you are interested, and the investment is not big, just find a gable near the community or construction site and you can finish it. Then you can start your business. You can learn by doing, and you can do other things later. The processing industry is similar, not too complicated. If you have never been exposed to this industry, then don't enter at a loss. The future of that line is bright, and the key is your operation mode. Making aluminum alloy doors and windows has little loss and little profit, because it is closely related to people's lives. After a long time, we need to change new doors and windows, newly renovated balconies, etc. It may not be big to earn a house in three years, but if you are the most junior boss, you can start here.