Snake Island, also known as "Xiaolongshan Island", is located in the Bohai Sea northwest of Lushunkou District, Dalian City, 25 nautical miles from Lushun Port. It is part of the Laotieshan National Nature Reserve of Snake Island, Liaoning, with a total area of about 0.8 square kilometers. The main peak of the island is 216 meters above sea level. There are 7 ridges, 6 ditches, 7 caves on the island. Except for a small pebble beach, they are all cliffs. There are more than 20,000 snakes on the island. Snake Island is the only island in the world that only survives a single python. There is only one python on the island, which is a highly venomous snake.