He transferred from the machinery industry to the construction industry in February 1997 and served as the deputy general manager of Zhejiang Lingyun water conservancy and Hydropower Construction Co., Ltd. since 2000, he has also served as the company's management representative, engaged in construction quality and safety management in the construction industry, and engaged in certification audit part-time since 2003. He has the qualification of auditor of quality, environment, occupational health and safety and energy management system, Since 2011, he has officially worked in the certification center of Beijing China Construction Association and employed as a full-time auditor to engage in certification. So far, he has audited more than 900 (Times) enterprises.