Aerial photo shows the night view at a light carnival in Fuling District of southwest China's Chongqing, Dec. 22, 2016.
A citizen does morning exercises at the Taoranting Park in Beijing, capital of China, Dec. 21, 2016. The Beijing environmental monitoring center said Tuesday that the worst air pollution would last from Tuesday evening to Wednesday. The smog will disperse from Wednesday evening to Thursday, when a northern wind is expected.
Photo taken on Dec. 20, 2016 shows a frozen waterfall in the Huhushui scenic area in Pingshan County of Shijiazhuang, capital of north China's Hebei Province.
The government of Macao Special Administrative Region holds a reception to celebrate the 17th anniversary of Macao's return to the motherland, in Macao, south China, Dec. 20, 2016.
Workers sort out navel oranges at an orange processing plant in Zigui County, central China's Hubei Province, Dec. 18, 2016. Navel oranges entered harvest season recently in Zigui.