Wei Yan: Male, born in 1965, bachelor degree, senior engineer. He has served as member of the Party Committee, director and deputy general manager of Guizhou Jiulian Enterprise Group Co., Ltd.; Director, deputy general manager and general manager of Guizhou Jiulian Civil Explosive Equipment Development Co., Ltd. He is currently a member of the Standing Committee of the Party Committee of Poly Jiulian Holding Group Co., Ltd. and a director and general manager of the fifth board of directors of the company.