A tourist takes photos of ice in a cave in Huzhong District, Dahinggan, northeast China's Heilongjiang Province, Jan. 12, 2020. Huzhong District is one of the coldest places in China, located at the northern foot of Yilehuli Mountain in Dahinggan. The annual average temperature here is minus 4.3 degrees Celsius, and the lowest temperature in town in history was minus 53.2 degrees Celsius. (Photo by Zhang Tao/Xinhua)