1August 945 15, the Japanese invaders announced their unconditional surrender, and the eight-year anti-Japanese war finally won a comprehensive victory. After Japan announced its surrender, the formal surrender ceremony of the North China Theater was held in the Hall of Supreme Harmony Square. It was 1945, 10, which marked the 20th anniversary of the establishment of the Palace Museum. On that day, the total number of people who came to watch the ceremony reached more than100000, and the Hall of Supreme Harmony, the Wumen Gate, the Duanmen Gate and even Tiananmen Square were crowded.

The ceremony officially started on 10 at 10. The bugle sounded at the top of Jingshan Mountain, and the salute sounded at the main venue of the Hall of Supreme Harmony. Present at the ceremony were Major General Rocchi, commander of the US military, Wharton, chief of staff, and representatives from Britain, the Soviet Union, France and the Netherlands. As the representative of China, General Sun Lianzhong, commander of the 11th Theater, stood in the center of the receiving platform under the pedestal of the Hall of Supreme Harmony. More than 20 Japanese delegates bowed their heads and entered from the left side of Taihe Gate. They went to the receiving platform and saluted General Sun. Then the Japanese representative signed and sealed the surrender book, put the combat knives on the surrender table and left Xihemen sadly. The ceremony lasted only 25 minutes, but the people of China who witnessed this scene were all excited and thunderous.