I highly recommend Xidao Island! The water quality here is exceptional, making for a fantastic diving experience where you can see vibrant corals and a variety of tropical fish. The island's natural scenery is breathtaking, with swaying coconut palms and fine, soft sand. Beyond the beauty, Xidao Island also boasts a rich cultural atmosphere, with ancient coral walls telling tales of bygone eras. Watching the sunset at the beach in the evening, with the sky painted in vibrant colors and the sea shimmering, is incredibly romantic. Moreover, the island is relatively affordable, and the fruit is cheap and sweet, making it a high-value tourist destination that you won't want to leave.