Chen Delin signed the share transfer agreement to acquire 5.01% stake in Suzhou Douson Drilling & Production Equipment Co.,Ltd. (SHSE : 603800) from Qingdao Mingying Investment Co., Ltd for approximately CNY 260 million on march 31, 2023. Chen Delin will acquire 10,420,800 shares in the company from Mingying Investment at transfer price is CNY 24.63 per share.