There is a project called waterproofing contractor. You may not know specifically what. I have to tell you. Waterproofing contractor is a profit can also but very strict requirements on process and quality of work. Waterproofing contractor go through bidding, screening and quality control to require a high level of quality. For small projects. To produce the relevant documents and previous large-sized apartment case to demonstrate the excellent performance of his. My brother is going to look for a job. I advised him to go to work in waterproofing contractor. It is a place where people exercise. Because the waterproofing contractor people working responsibility heart is very strong. I really admire them. Also very grateful to them.