Photo taken on Jan. 9, 2019 shows frost scenery at the Huangshan Mountain Scenic Area in east China's Anhui Province. Frost scenery can be seen after a drop in temperature recently. (Xinhua/Shi Guangde)

　　Photo taken on Jan. 9, 2019 shows frost scenery at the Huangshan Mountain Scenic Area in east China's Anhui Province. Frost scenery can be seen after a drop in temperature recently. (Xinhua/Shi Guangde)

　　Photo taken on Jan. 9, 2019 shows frost scenery at the Huangshan Mountain Scenic Area in east China's Anhui Province. Frost scenery can be seen after a drop in temperature recently. (Xinhua/Shi Guangde)

　　Photo taken on Jan. 9, 2019 shows frost scenery at the Huangshan Mountain Scenic Area in east China's Anhui Province. Frost scenery can be seen after a drop in temperature recently. (Xinhua/Shi Guangde)

　　Photo taken on Jan. 9, 2019 shows frost scenery at the Huangshan Mountain Scenic Area in east China's Anhui Province. Frost scenery can be seen after a drop in temperature recently. (Xinhua/Shi Guangde)