Aerial photo taken on Jan. 11, 2020 shows the scenery of rime-covered trees in the Jingpohu Global Geopark in Mudanjiang, northeast China's Heilongjiang Province. (Photo by Zhang Chunxiang/Xinhua)

Tourists take photos of the scenery of rime-covered trees in the Jingpohu Global Geopark in Mudanjiang, northeast China's Heilongjiang Province, Jan. 11, 2020. (Photo by Zhang Chunxiang/Xinhua)

Aerial photo taken on Jan. 11, 2020 shows the scenery of rime-covered trees in the Jingpohu Global Geopark in Mudanjiang, northeast China's Heilongjiang Province. (Photo by Zhang Chunxiang/Xinhua)

People tour the Jingpohu Global Geopark to enjoy the scenery of rime-covered trees in Mudanjiang, northeast China's Heilongjiang Province, Jan. 11, 2020. (Photo by Zhang Chunxiang/Xinhua)

People tour the Jingpohu Global Geopark to enjoy the scenery of rime-covered trees in Mudanjiang, northeast China's Heilongjiang Province, Jan. 11, 2020. (Photo by Zhang Chunxiang/Xinhua)