Mr. YANG Zhongshi (楊忠實先生), aged 58, joined our Group in April 1998 and has been the vice chairman of the Board, an executive Director and the general manager of our Company from 30 May 2018 to 28 March 2025. With effect from 28 March 2025, Mr. YANG has been re-designated as a non-executive Director.

Mr. YANG has approximately 34 years of workingexperience in the heating industry and held various senior management positions within our controlling shareholder, Changre Group. He was the deputy chief engineer and the head of the technical equipment department of Changre

Group from December 2000 to December 2002 and was promoted to chief engineer since December 2002, mainly responsible for overall technology management. He served as the deputy general manager at Changre Group from February 2011 to April 2016, mainly responsible for production management, production safety management and end-users service management, and the general manager from April 2016 to May 2018, mainly responsible for overall business management and implementation of policies passed by the board of directors. Mr. YANG was appointed as a director of Changre Group from August 2017 to October 2019. Since May 2018, he has not participated in the daily operation of Changre Group and

has been mainly responsible for formulation of corporate strategies. He was a director at Jilin Province Heating Engineering Design and Research Company Limited* (吉林省熱力工程設計研究有限責任公司) from September 2012 to July 2018, mainly responsible for overall management of business and operations. Mr. YANG served as a director in Jilin Province Xinda Investment Management Co., Ltd. from June 2017 to November 2021 and has served as a director in Yatai Heating since December 2019. Mr. YANG graduated with a bachelor’s degree in power plant thermal power engineering from Northeast China Institute of Electric Power Engineering (東北電力學院) (now known as Northeast Electric Power University (東北電力大學)) in Jilin Province, the PRC, in June 1989. Mr. YANG was accredited as a senior engineer in thermal energy engineering by Human Resources and Social Security Bureau of Jilin Province (吉林省人力資源和社會保障廳) in January 2013. He was appointed as a member of the technical expert committee of China District Heating Association (中國城鎮供熱協會) in March 2017.