At Zijin Ecological Park, No.60, Zhong Ling Street, Xiaolingwei, the training was conducted in the diving hall of Nanjing Institute of Physical Education.

Many diving organizations in the world are recognized by CMAS and can issue internationally recognized diver certificates. The most famous is PADI.

Although CMAS is the only official organization, there is no systematic teaching material in China. PADI is a very good organization in the formulation and implementation of training standards. Its Asia-Pacific management center is located in Sydney, Australia.

According to PADI standards, the junior diver-Open Water Diver (OWD) needs to complete 8- 10 hours of swimming pool courses, 5 open water experience and examination courses and pass the theoretical written test. Divers in open waters can dive to a depth of 18m.

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The benefits of diving are not only the great enjoyment brought by the strange world in water, but also the improvement of human heart and lung function. In the United States and Japan, diving is even used as an auxiliary means to treat cancer. According to scientific proof, the balanced pressure of water on human body contributes to blood circulation.

Long-term underwater oxygen inhalation can effectively kill cancer cells and inhibit their spread. But because of the high cost of diving, most people can't afford it.

Although the basic training fee is only about 2000 yuan, not everyone can digest the equipment and travel expenses that follow. A good set of equipment, ordinary 20,000 to 30,000, advanced10,000. If you want to go to a good natural sea area, there are Malaysia and Thailand nearby and Australia and the Red Sea in the distance.

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