There are relatively few in the south. They are all wholesale in the north, but one thing is that the distance between the north and the south is too far and the after-sales service is not in place.
So now people in the south are slowly starting to make valves, which adds to this. That's what my friend did. It's okay.
If you can go to the south. Guangdong is best in Dongguan and the east of Shenzhen.