2. North Sea. If you choose Sanya's favorite place except Hainan, it must be Beihai. Beihai is located in the southwest of Hainan Province, facing Sanya across the sea, with an area of 624 square kilometers and a population of about 600,000. It is bordered by Qiongzhou Strait in the north, Beibu Gulf in the east, South China Sea in the south and the central and eastern coast of Hainan Island in the west. Now Beihai is particularly popular, and all parts of the country are red nets and red cities. It is estimated that tourists are indispensable during the National Day holiday.