Photo taken with a mobile phone shows a crane statue in the Palace Museum in Beijing, capital of China, Nov. 4, 2020. The year 2020 marks the 600th anniversary of the Forbidden City. The Palace Museum was built on the base of the former imperial compound in 1925. (Xinhua/Hou Dongtao)

Photo taken with a mobile phone shows a view in the Palace Museum in Beijing, capital of China, Sept. 1, 2020. The year 2020 marks the 600th anniversary of the Forbidden City. The Palace Museum was built on the base of the former imperial compound in 1925. (Xinhua/Meng Chenguang)

Photo taken with a mobile phone shows people visiting the Palace Museum in Beijing, capital of China, Sept. 1, 2020. The year 2020 marks the 600th anniversary of the Forbidden City. The Palace Museum was built on the base of the former imperial compound in 1925. (Xinhua/Meng Chenguang)

Photo taken with a mobile phone shows a view in the Palace Museum in Beijing, capital of China, Nov. 4, 2020. The year 2020 marks the 600th anniversary of the Forbidden City. The Palace Museum was built on the base of the former imperial compound in 1925. (Xinhua/Hou Dongtao)

Photo taken with a mobile phone shows a view in the Palace Museum in Beijing, capital of China, Nov. 4, 2020. The year 2020 marks the 600th anniversary of the Forbidden City. The Palace Museum was built on the base of the former imperial compound in 1925. (Xinhua/Hou Dongtao)

Photo taken with a mobile phone shows a visitor posing for pictures in the Palace Museum in Beijing, capital of China, Nov. 4, 2020. The year 2020 marks the 600th anniversary of the Forbidden City. The Palace Museum was built on the base of the former imperial compound in 1925. (Xinhua/Hou Dongtao)

Photo taken with a mobile phone shows visitors posing for pictures in the Palace Museum in Beijing, capital of China, Nov. 4, 2020. The year 2020 marks the 600th anniversary of the Forbidden City. The Palace Museum was built on the base of the former imperial compound in 1925. (Xinhua/Hou Dongtao)

Photo taken with a mobile phone shows visitors posing for pictures in the Palace Museum in Beijing, capital of China, Nov. 4, 2020. The year 2020 marks the 600th anniversary of the Forbidden City. The Palace Museum was built on the base of the former imperial compound in 1925. (Xinhua/Hou Dongtao)