A full moon is seen in Daxing District of Beijing, capital of China, Sept. 21, 2021.(Photo: Xinhua)

A full moon is seen in Zhengzhou, central China's Henan Province, Sept. 21, 2021.(Photo: Xinhua)

A full moon is seen in Zhengzhou, central China's Henan Province, Sept. 21, 2021.(Photo: Xinhua)

A full moon is seen at Yanzhou ancient town in Jiande City of east China's Zhejiang Province, Sept. 21, 2021.(Photo: Xinhua)