China's Qiandao Lake is located in Hangzhou City, Zhejiang Province. It is known as "the most beautiful water in the world" and its negative ion concentration is about 62,000/cm³. The negative ion resources here have brought many benefits to people.

Benefits of negative ions to humans: Negative ions are called "air vitamins" and have a positive impact on human health. Scientific research has found that negative ions can promote human metabolism, improve the functions of the respiratory system, cardiovascular system and nervous system, enhance immunity, and have certain auxiliary treatment and health care effects on the human body. Especially negative ions with small particle sizes have high activity and long migration distance. They can easily penetrate the blood-brain barrier of the human body and have a more significant impact on human health.

The negative ion content of Qiandao Lake: The negative ion concentration of Qiandao Lake is about 62,000 ions/cm³, which far exceeds the standard concentration of negative ions in fresh air recommended by the World Health Organization (not less than 1,000 to 1,500 ions per cubic centimeter). At Qiandao Lake, people can breathe fresh air rich in negative ions and enjoy the health benefits brought by nature.

Ecological environment and negative ion content: The excellent ecological environment of Qiandao Lake is the main reason for the high negative ion content. Qiandao Lake has a vast water area with clear water, surrounded by green mountains and high forest coverage. These natural resources provide good conditions for the generation of negative ions. In addition, water molecules in lakes will also produce a large number of negative ions under the action of natural factors such as sunlight and wind.

Attracting tourists and health care: Due to its high negative ion content, Qiandao Lake attracts a large number of tourists every year to enjoy the greenery, breathe oxygen, and filter the heart and lungs. Visitors can enjoy the health benefits of negative ions at Qiandao Lake while admiring the beautiful natural scenery.

In short, Qiandao Lake in Hangzhou City, Zhejiang Province, with its high negative ion content, provides people with a good place to get in close contact with nature and enjoy a healthy life. Here, people can breathe the fresh air rich in negative ions and enjoy the tranquility and comfort of returning to nature.