For children who are only three or four months old, at present, breast milk is the main dietary advice, so it is not recommended to increase complementary food, and the shark fin you mentioned is actually even less recommended. First of all, shark fin is not very nutritious and difficult to digest. In order to taste in the cooking process, various seasonings are generally added. For children who are only three or four months old, the gastrointestinal burden is too great, so it is recommended not to eat.