Mr. Sui Yumin is Vice President of China National Materials Co Ltd. He was serving as the chairman of the board of directors of Sinoma Cement since April 2010. Mr. Sui has over 30 years of extensive work experience in the cement industry. He held various positions in Lunan Cement Factory from August 1986 to August 2003 such as deputy chief engineer and executive deputy general manager. Mr. Sui served as the deputy general manager of Sinoma Cement and the chairman of the board of directors and general manager of Sinoma Hanjiang from August 2003 to September 2004. Subsequently, Mr. Sui served as the deputy general manager and executive deputy general manager of Tianshan Cement until July 2007. Mr. Sui served as a director of Tianshan Cement from October 2005 to December 2013, and a director of Ningxia Building Materials from December 2008 to April 2015. Mr. Sui is entitled to special government allowances from the State Council, and is currently the vice president of China Cement Association. Mr. Sui graduated from Shandong Institute of Building Materials in July 1986, majoring in cement engineering, and obtained his executive master degree in business administration from Cheung Kong Graduate School of Business in September 2010. Mr. Sui is currently a professorate senior engineer.