HINGGAN, Jan. 26, 2016 (Xinhua) -- A train runs in Arxan City of Hinggan League, north China's Inner Mongolia Autonomous Region, Jan. 10, 2016. (Xinhua/Chen Sihan)

HINGGAN, Jan. 26, 2016 (Xinhua) -- Photo taken on Jan. 9, 2016, shows winter scenery of a nonfreezing river in Arxan of Hinggan League, north China's Inner Mongolia Autonomous Region. The river never freezes because of the geothermal phenomenon. (Xinhua/Chen Sihan)

HINGGAN, Jan. 26, 2016 (Xinhua) -- Photo taken on Jan. 10, 2016, shows winter scenery of Bailang Mountain in Arxan City of Hinggan League, north China's Inner Mongolia Autonomous Region. (Xinhua/Chen Sihan)

HINGGAN, Jan. 26, 2016 (Xinhua) -- Photo taken on Jan. 8, 2016, shows winter scenery of Sanjiao Mountain in Arxan City of Hinggan League, north China's Inner Mongolia Autonomous Region. (Xinhua/Chen Sihan)

HINGGAN, Jan. 26, 2016 (Xinhua) -- Photo taken on Jan. 11, 2016, shows winter scenery of a nonfreezing river in Arxan of Hinggan League, north China's Inner Mongolia Autonomous Region. The river never freezes because of the geothermal phenomenon. (Xinhua/Chen Sihan)

HINGGAN, Jan. 26, 2016 (Xinhua) -- Photo taken on Jan. 10, 2016, shows winter scenery of Bailang Mountain in Arxan City of Hinggan League, north China's Inner Mongolia Autonomous Region. (Xinhua/Chen Sihan)

HINGGAN, Jan. 26, 2016 (Xinhua) -- Photo taken on Jan. 9, 2016, shows winter scenery of a forest farm in Arxan City of Hinggan League, north China's Inner Mongolia Autonomous Region. (Xinhua/Chen Sihan)

HINGGAN, Jan. 26, 2016 (Xinhua) -- Photo taken on Jan. 11, 2016, shows winter scenery of a nonfreezing river in Arxan of Hinggan League, north China's Inner Mongolia Autonomous Region. The river never freezes because of the geothermal phenomenon. (Xinhua/Chen Sihan)

HINGGAN, Jan. 26, 2016 (Xinhua) -- Photo taken on Jan. 10, 2016, shows winter scenery of Bailang Mountain in Arxan City of Hinggan League, north China's Inner Mongolia Autonomous Region. (Xinhua/Chen Sihan)

HINGGAN, Jan. 26, 2016 (Xinhua) -- Photo taken on Jan. 9, 2016, shows winter scenery of a nonfreezing river in Arxan of Hinggan League, north China's Inner Mongolia Autonomous Region. The river never freezes because of the geothermal phenomenon. (Xinhua/Chen Sihan)