Go by yourself! Train to Nanning! ! Then take the intercity express to Beihai! Visit Haizhu Square, Ocean Park and Underwater World, then take a bus to Yintan and find a private hotel near the entrance of Yintan! It's clean, but the equipment is not very good. If you want to surf the internet, it's all gone, and the price is not expensive! The key is to go offshore, and playing in the sea for two days will make you tired ~ ~ If your four days include going back and forth, then go back after playing in the sea! ! If the round trip time is not included, you can also go to Weizhou Island to play. Diving is a major feature of this island! !