涉嫌严重违纪违法，杨学卫被查

Group 1 - The central figure involved is Yang Xuewei, a member of the Party Committee and Chief Accountant of China Petroleum Southwest Chemical Sales Company, who is under investigation for serious violations of discipline and law [1] - The investigation is being conducted by the Central Commission for Discipline Inspection and the National Supervisory Commission, along with the Gansu Provincial Commission for Discipline Inspection [1]