On the morning of September 5, 2018, the group company held the fifth science and technology conference. Chai Wenzhong, deputy director of the Municipal Municipal Municipal Committee of Municipalities, Wu Jianmin, deputy director of the Municipal Science and Technology Commission, and Guo Junfeng, deputy director of the Torch Center of the Ministry of Science and Technology, and other leaders of Yingli Group, including Lin Guohua, Li Guoming and Liu Yuping, attended the group's various departments and units. The rest of the people attended the meeting.