Photo taken on Dec. 9, 2018 shows the Halha River in Arxan, north China's Inner Mongolia autonomous region. Despite of the severe cold in winter, one section of the Halha River in Arxan is never frozen because of the geothermal sources nearby. [Photo/Xinhua]
Aerial photo taken on Dec. 9, 2018 shows the Halha River in Arxan, north China's Inner Mongolia autonomous region. Despite of the severe cold in winter, one section of the Halha River in Arxan is never frozen because of the geothermal sources nearby. [Photo/Xinhua]
Photo taken on Dec. 9, 2018 shows the Halha River in Arxan, north China's Inner Mongolia autonomous region. Despite of the severe cold in winter, one section of the Halha River in Arxan is never frozen because of the geothermal sources nearby. [Photo/Xinhua]