What is the negative oxygen ion content in Changxing, Zhejiang?

Correspondence table between natural environment and negative oxygen ion concentration:

Through this table, we can roughly understand the content of negative oxygen ions in Changxing, Zhejiang Province, and also understand the relationship between negative ion content and human health. Medical practice shows that negative oxygen ions can promote human growth and prevent many diseases, which is a necessary factor for human health and longevity. With the development of science and technology, people have mastered the artificial generation of ecological negative ions equivalent to nature. The negative ion generator with the national patent technology of ecological negative ion generation chip technology allows us to enjoy the fresh air like Bahrain at home.