Doumob announced that due to other business arrangements, Mr. Liu Binghai has tendered his resignation as an independent non-executive Director, a member of the audit committee and the nomination committee and the chairman of the remuneration committee of the Company with effect from December 29, 2021. The Board further announced that, Mr. Zhang Xuehuo ("Mr. Zhang") has been appointed as an independent non-executive Director, a member of the audit committee and the nomination committee and the chairman of the remuneration committee of the Company with effect from December 29, 2021. Mr. Zhang has engaged in investment industry for nearly 30 years and has extensive experience in overseas mining resources, energy, real estate, biomedical, and health industries. Mr. Zhang has been the chairman of China Mineral Ventures Limited ("China Mineral Ventures") since 1997. He was the founder of China Mineral Ventures. Mr. Zhang founded China Gold Development Group (H.K.) Limited ("China Gold"), a subsidiary of Zijin Mining Group Co. Ltd., the shares of which were listed on The Stock Exchange of Hong Kong Limited (the "Hong Kong Stock Exchange") in 1999. He was the chairman of China Gold from 2003 to 2006 and has been its director since 2016. Mr. Zhang was the chairman of Shandong Guoda Gold Company Limited ("Shandong Guoda Gold") from 2003 to 2011. Mr. Zhang is currently a director of Shandong Guoda Gold. Mr. Zhang has been an independent non-executive director and the chairman of Nomination and Remuneration Committee, a member of each of the Audit Committee and Development Strategy and Risk Management Committee of Prinx Chengshan Holdings Limited, a company listed on the Hong Kong Stock Exchange, since September 2018. Mr. Zhang obtained a bachelor's degree in international trade in 1985 from The School of International Trade, Xiamen University in China.