Watch out the coconut
2 RMB for a big juicy coconut, haha.
Areca, together with coconut are tow most popular "fruit"? in hainan island.
Arecas are thoses small green fruit which taste very astringent. You are meant to chew them with a piece of leaf, and it can get you anesthetized after a few minutes when the saliva you spit out turns orange/red.
The locals believe that chewing arecas is extremely good for your teeth.