Sansha city can't just go. Individuals going to Sansha City generally have to apply to the Haikou Office of Sansha Municipal Government. After passing the exam, you can board the ship in Wenchang with your ticket. Sansha City is a prefecture-level city in Hainan Province, located in the South China Sea in the south-central part of China and in the south of Hainan Province. Sansha is different from ordinary cities. It belongs to the border and needs to go through the formalities. Before going to Sansha, you need to apply for a certificate similar to going to Hong Kong. To apply for a permit, you need to fill in an application form, paste a copy of your ID card and my photo on the application form, sign a health certificate at the same time, and finally sign a contract. Travel to Sansha City requires travel agency organization, and free travel is not allowed, so you can directly consult the travel agency with this service if you need any documents to go to Sansha City.