The board (Board) of directors (Director(s)) of Sino Energy International Holdings Group Limited (Company) announced that Mr. Wang Qingsan ("Mr. Wang") has tendered his resignation as an executive Director due to retirement with effect from 31 July 2022. Mr. Wang has confirmed that he has no disagreements with the Board and there are no matters relating to his resignation that need to be brought to the attention of the shareholders of the Company and The Stock Exchange of Hong Kong Limited (the "Stock Exchange").