Wisdom Financial News APP reports that PetroChina (00857) announced that Cai Jinyong has submitted his resignation to the company due to work changes, resigning from the independent non-executive director, director of the Board of Directors' Nomination Committee, and Compensation Committee; Xiong Lushan has submitted her resignation to the company due to work changes, resigning from the independent non-executive director and Chairman of the Board of Directors' Audit Committee.