When Jiang Zemin came into power and succeeded as Party General Secretary in 1989, the 747SPs were permanently returned to passenger service, and 747-400s were utilized. They were used throughout the use of Jiang, Hu Jintao and Xi Jinping. The 747-400s originally belong to Air China, but one month before the president goes on an official trip, the chosen plane is specifically inspected and retrofitted for VIP use.