Zuo is the chief distinguished lecturer of Yousen. According to relevant information, Zuo is the chief invited lecturer of Yousen, and he is called "Kao Shen" by the industry. He has been engaged in pre-test training for supervision for nearly 20 years, and has also participated in the preparation of propositions, exams and standard answers for the first-level construction engineer, cost engineer and supervision engineer's qualification examinations. He also participated in the discussion of building a system for many times, conducted targeted training on various problems and development bottlenecks encountered in the process of professional skills, human resources, project management and development of enterprises, and put forward feasible suggestions. Yousen Education is a company that focuses on the training of first-class builders, first-class cost engineers and supervision engineers.