Tourists visit a canyon in Pingshan Village in Hefeng County, central China's Hubei province, Dec 21, 2020. (YANG SHUNPI / XINHUA)

Tourists visit a canyon in Pingshan Village in Hefeng County, central China's Hubei province, Dec 21, 2020. (TAN TAO / XINHUA)

Tourists visit a canyon in Pingshan Village in Hefeng County, central China's Hubei province, Dec 21, 2020. (TAN TAO/XINHUA)

This Dec 21, 2020, photo shows the sunrise at Banruo Lake in Houjiazhai Township in Tangshan, north China's Hebei province. (LIU MANCANG / XINHUA)

This Dec 21, 2020, photo shows the scenery at a park in Minhang District, east China's Shanghai. (ZHANG JIANSONG / XINHUA)

This Dec 21, 2020, photo shows the scenery at a park in Minhang District, east China's Shanghai. (ZHANG JIANSONG / XINHUA)

This Dec 21, 2020, photo shows the scenery at a park in Minhang District, east China's Shanghai. (ZHANG JIANSONG / XINHUA)