/kloc-0.5 million years ago, Britain was still a shallow beach surrounded by the sea. Because it is far away from the seawater recharge site, a large amount of evaporated salt has been deposited in the long-term ebb and flow of seawater, and the concentration of water body is high, which has become a platform salt-forming area. During Jurassic and Cretaceous, it was buried underground by the earth's orogeny, forming an amazing geological wonder of ancient underground salt lakes. This huge salt lake is buried deep underground.

3000 meters, salt water reserves as high as 4.2 billion tons, known as the "sea of death." It is strikingly similar to the Dead Sea in the Middle East. It not only originated at the same time, but also located at 30 degrees north latitude. Even the composition and salt content of seawater are similar. Whether it is the Dead Sea or the Dead Sea in the Middle East, there is 1 kg of salt in every 4 kg of seawater, so people can easily float on the water.

The Sea of Death is located in Penglai Town, Daying County, Sichuan Province. It is another highlight of Sichuan's tourism industry and another magical landscape of 30 degrees north latitude. Its seawater (bittern water) comes from 3,000 meters underground, the outlet temperature is as high as 87 degrees Celsius, and the salt content exceeds 22%. Mainly chloride, similar to the "Dead Sea" in the Middle East, people can easily float in the water without sinking. Seawater is rich in more than 40 minerals and trace elements such as sodium, potassium, calcium, bromine and iodine. Verified by the relevant national authorities, it has obvious physiotherapy effect on rheumatoid arthritis, dermatosis, obesity, cardiovascular and cerebrovascular diseases, respiratory diseases and so on. According to the relevant research data of UNESCO, people can sleep for eight hours by floating in the dead sea for one hour.