A skier is seen at a ski field during a snowfall in Chongli District of Zhangjiakou City, north China's Hebei Province, Nov. 18, 2020. A snowfall hit Chongli on Wednesday. (Photos: Xinhua)

People ski at a ski field during a snowfall in Chongli District of Zhangjiakou City, north China's Hebei Province, Nov. 18, 2020. A snowfall hit Chongli on Wednesday.

People are going to ski at a ski field during a snowfall in Chongli District of Zhangjiakou City, north China's Hebei Province, Nov. 18, 2020. A snowfall hit Chongli on Wednesday.

People ski at a ski field during a snowfall in Chongli District of Zhangjiakou City, north China's Hebei Province, Nov. 18, 2020. A snowfall hit Chongli on Wednesday.

People ski at a ski field during a snowfall in Chongli District of Zhangjiakou City, north China's Hebei Province, Nov. 18, 2020. A snowfall hit Chongli on Wednesday.

People ski at a ski field during a snowfall in Chongli District of Zhangjiakou City, north China's Hebei Province, Nov. 18, 2020. A snowfall hit Chongli on Wednesday.

People ski at a ski field during a snowfall in Chongli District of Zhangjiakou City, north China's Hebei Province, Nov. 18, 2020. A snowfall hit Chongli on Wednesday.