A tourist takes photos of snow scenery in Xixi National Wetland Park in Hangzhou, east China's Zhejiang Province, Jan. 28, 2018. (Xinhua/Huang Zongzhi)

Aerial photo taken on Jan. 28, 2018 shows snow scenery in Xixi National Wetland Park in Hangzhou, east China's Zhejiang Province. (Xinhua/Huang Zongzhi)

Aerial photo taken on Jan. 28, 2018 shows snow scenery in Xixi National Wetland Park in Hangzhou, east China's Zhejiang Province. (Xinhua/Huang Zongzhi)

Aerial photo taken on Jan. 28, 2018 shows snow scenery in Xixi National Wetland Park in Hangzhou, east China's Zhejiang Province. (Xinhua/Huang Zongzhi)