Travel from Yantai to Sanya for a while, see the South China Sea, and want to buy some local products. What do the locals recommend?

Sanya Yalong Bay, Tianya Haijiao, Luhuitou, Wuzhizhou and Nanhai Guanyin are all coconut products, such as coconut powder, papaya powder, coconut sugar, and many fruits, as well as seafood, abalone, sea cucumber, scallop, conch, cuttlefish and squid, which are all messy, but they are all very expensive. If you want to buy more, go to several stores.