Ready to enter the after-sales industry of water pumps, I want to know how this industry is?

For reference only: generally, only the after-sales maintenance of pumps of their own brands is available. If this brand of pump sells more, it will be more prosperous after sale. Moreover, the products of the pump are all connected, and other pumps can be repaired, which is more promising. However, it's hard to travel frequently. In fact, depending on the product and the environment, the model of the pump used may be very different. Many domestic pump manufacturers don't even produce pumps. They just entrust these companies to assemble and sell their products in China. The prospects are good. At present, there is a serious shortage of pump maintenance personnel in the market, and many common problems can not be solved well. These problems are very serious.