Sika deer are seen at a garden of the Hall of Benevolent Peace in the Palace Museum in Beijing, capital of China, June 4, 2018. (Photos: Xinhua)

Sika deer are seen at a garden of the Hall of Benevolent Peace in the Palace Museum in Beijing, capital of China, Sept. 26, 2017.

Nine sika deer from the Imperial Summer Resort in north China's Chengde have been selected for demonstration in the Hall of Benevolent Peace in the Palace Museum since 2017.

Nine sika deer from the Imperial Summer Resort in north China's Chengde have been selected for demonstration in the Hall of Benevolent Peace in the Palace Museum since 2017.

Visitors look at sika deer at a garden of the Hall of Benevolent Peace in the Palace Museum in Beijing, capital of China, Sept. 26, 2017.