On the one hand, they are close to the sea. After all, China has a tradition of "relying on mountains to eat the sea", where they can taste all kinds of delicious seafood. Moreover, because they have been close to the sea for a long time, they have been exposed to this kind of seafood since childhood and explored different ways to eat it. They will not get tired of eating seafood for a long time.

On the other hand, it is their habit. After all, many people at the seaside often fish and catch some seafood for sale. For those seafood that can't be sold, they don't want to throw it away, so they can only eat it themselves. And you don't have to go out to buy other food, on the one hand, you can save money, on the other hand, you can fill your stomach, and seafood is not so greasy, unlike pork, chicken and duck.

The last aspect is their traditional customs. After all, they have many customs close to the sea, which are inseparable from seafood.