5. Da Xing An Ling (Greater Khingan Mountains)

Location: north of Heilongjiang Province and the Inner Mongolia Autonomous Region

Reason: the biggest oxygen bar in China, one of the top three low-carbon scenic zones.

Covering a large forest area - a total of 84.6-thousand square meters, equal to the territory of Austria or 137 Singapores - Da Xing An Ling is an oxygen-providing paradise. There are more than 400 wild animals and 1,000 wild plants living in the area. It is an ideal getaway for trekking, exploring and escaping from the heat of summer.