Mr. YANG Guohua（楊國華）, aged 52, has over 29 years’ experience in the coal mining industry.Mr. Yang was appointed as executive general manager, chief engineer and safety supervisor of Guizhou Puxin in December 2019, April 2019 and August 2018 respectively. Prior to joining the Group, Mr. Yang worked as chief engineer and general manager of Guizhou Langyue Mining Investment Co., Ltd. (貴州省朗月礦業投資有限公司) in June 2012 and April 2016 respectively, and served there until July 2018. During this period, he was responsible for overall management of coalmine safety, production, operation, technological plan, construction, projection bidding and contract execution. He served as deputy general manager and head of safety supervision department of Guizhou Nengfa Power Fuel Development Co., Ltd. (貴州能發電力燃料開發有限公司) from May 2011 to May 2012. During this period, he was in charge of the safety supervision and management of subsidiary coalmines andexamination and approval of safe production plans submitted by subsidiary coalmines. He was general manager and chairman of board of Guizhou Qianxi Guijing Coal Development Co., Ltd (貴州黔西桂箐煤炭開發有限公司) from October 2009 to May 2011, in charge of the overall management of Guijing Coalmine (桂箐煤礦), including management of safety, technology, engineering construction, project settlement, project bidding, project quality, finance, material procurement, human resources and public relations. He acted as deputy general manager and chief engineer of Guijing Coalmine from April 2007 to September 2009, primarily responsible for construction and technical management of Guijing Coalmine. He worked as mine director of Yizhong Coalmine (義忠煤礦) of Guizhou Nengfa Power Fuel Development Co., Ltd from March 2006 to March 2007, in charge of overall management of mine construction. He was mining district chief and head of engineering technology department of Guizhou Linhua Mining Investment Co., Ltd. (貴州林華礦業有限公司) from May 2004 to February 2006, mainly responsible for coalmine construction management and mining district production and safety management. He served as mining district chief and head of transportation district of Datonger Coalmine (打通二煤礦) of Songzao Mining Bureau (松藻礦務局) from July 2001 to April 2004. He worked as a technician and mining district chief at Datonger Coalmine from July 1991 to August 1998 and was responsible for establishing the internal coal mining-related operational policies, providing technological training to mining team and involved in the design and construction of mining project and daily management in safety, production and technology. Save as disclosed above, Mr. Yang does not hold any other position with the Company or any member of the Group. Mr. Yang graduated from Sichuan Normal University (四川師範大學) with a diploma in mining engineering in June 2001. Mr. Yang graduated, as a correspondence student, from Guizhou University (貴州大學) with a bachelor’s degree in mining engineering in July 2014. He obtained National Certification of Construction Cost Estimator Qualification in Mining Construction (Intermediate) from China Cost Engineering Association (中國建設工程造價管理協會) and China Coal Construction Association (中國煤炭建設協會) in July 2007. He was certified as Registered Safety Engineer by Department of Personnel of Guizhou Province (貴州省人事廳) in January 2008. He was accredited as a senior engineer of mining engineering by Department of Human Resources and Social Security of Guizhou Province (貴州省人力資源和社會保障廳) and Guizhou Federation of Industry and Commerce (貴州省工商業聯合會) in November 2015. He was appointed as coalmine safety production expert for five years beginning from 11 June 2020 by Guizhou Coal Mine Safety Supervision Bureau (貴州煤礦安全監察局) in June 2020. Mr. Yang did not hold any directorship in any publicly-listed companies in the past three years.