What about Dalian Polytechnic Modern Engineering Testing Co., Ltd.?

As far as I know, it's not very big. It is a school-run enterprise of Dalian University of Technology. Relying on the Department of Architecture and Engineering of the University of Technology, many professors and associate professors in the school are well paid. It depends on what you do. Bachelor degree or above, about 10w after working for several years. I'm not sure. Some students work there.