Yang Gaoyu: Male, born in February 1968, China nationality, without permanent residency abroad, graduated from new york Institute of Technology, USA, majoring in business administration, with a postgraduate degree, a certified public accountant in China, a certified tax accountant in China, and a forensic accountant appraiser in party member, china zhi gong party. 1993 to 20 12 years, as the chief partner of Shenzhen Great Wall Certified Public Accountants Co., Ltd.; 20 12 years to date, as a partner of Beijing CSI Tiantong Certified Public Accountants (special general partnership); From April 20 14 to May 2020, he served as an independent director of Shenzhen Changying Precision Technology Co., Ltd.; From 20 17 1 month to February 2020, he served as an independent director of Jinggangshan Tourism Development Co., Ltd.; From April 20 17 to present, he has served as an independent director of Baolingbao Biological Co., Ltd.; From September 20 18 to present, he has served as an independent director of Zhongfutai Culture and Architecture Co., Ltd.; From September 20 18 to present, he has served as an independent director of the company. From July 20 19 to present, he has served as the executive director and general manager of Zhongtian Dexiang Tax Agency (Shenzhen) Co., Ltd.