Chaikou Diving Area is the northernmost site among the three diving areas on Green Island(Lyudao) . It has reef rocks spread all over the seabed and is known for its magnificent landscape of stony corals. Apparently here is a natural perfect tourism location. As the strong southwest wind blows Green Island(Lyudao)  from June to August every year, Chaikou Diving Area in the lee side is more suitable for snorkeling. In addition, most of the B&Bs on Green Island(Lyudao)  are located here. After snorkeling, it is very convenient to return to the B&B for showing.