Thirty percent. According to Baidu map website, Yichun National Forest Park in Heilongjiang is the natural oxygen bar of nature, and the oxygen content in the air reaches 30%. Because Yichun National Forest Park is a natural forest, the coverage rate of dense trees reaches 90%, so the oxygen content in the air is high. The high concentration of negative oxygen ions and the ecological, green and pollution-free natural environment endow it with rich resources, lush vegetation, fresh air and lush everything. Jiufengshan Tourist Area in Yichun covers an area of 5,280 hectares. The beautiful Jiufeng Mountain Health Valley Scenic Area is located 8 kilometers east of Jinshantun District, Yichun City, Heilongjiang Province, covering an area of 5,280 hectares.