Photo taken on March 26, 2020 shows a volcano covered by snow at the Ulan Hada volcano group in north China's Inner Mongolia Autonomous Region. (Xinhua/Peng Yuan)

Photo taken on March 26, 2020 shows a volcano covered by snow at the Ulan Hada volcano group in north China's Inner Mongolia Autonomous Region. (Xinhua/Peng Yuan)

Photo taken on March 26, 2020 shows a volcano covered by snow at the Ulan Hada volcano group in north China's Inner Mongolia Autonomous Region. (Xinhua/Peng Yuan)

Photo taken on March 26, 2020 shows a volcano covered by snow at the Ulan Hada volcano group in north China's Inner Mongolia Autonomous Region. (Xinhua/Peng Yuan)

Photo taken on March 26, 2020 shows a volcano covered by snow at the Ulan Hada volcano group in north China's Inner Mongolia Autonomous Region. (Xinhua/Peng Yuan)