Mr. Liu joined the Board of Directors of the Company in August 2019. Mr. Liu is a professor-level senior engineer. He received a doctorate degree in engineering science from National University of Defense Technology. Mr. Liu served as Deputy General Manager and General Manager of China Unicom Hunan branch and General Manager of China Unicom Jiangsu provincial branch. He is also a Vice President of China Telecommunications Corporation, a Deputy Director General of China Institute of Communications and a Director of Global System for Mobile communications Association (GSMA). Mr. Liu has extensive experience in management and the telecommunications industry.