My classmate is dedicated to waterproofing contractor, and my father is a real estate developer, so sometimes my dad built a building, I let my students waterproofing contractor, in this way, we can rest assured that the father and son, because of my classmates after graduating from university has been doing waterproofing contractor, his team players they know a thing or two, each time my classmates as long as to find a good work, don’t tube, the goods are handed over to them to do, he can rest assured, but he gave his team employee benefits are fairly good, because after all, this job is quite hard, may be because people well! So his live source are constantly, basically are some old customers looking for him to do it.