Friends and relatives have three glasses of thin wine, and light dishes are served to guests. What do you mean?

On the surface, it is to entertain friends and relatives with light wine and a table of light dishes, but in fact it is to show modesty.

The meaning of this sentence is not really to entertain friends and relatives with light wine and light vegetables. "Three glasses of light wine" and "a dish of small dishes" mean modesty here.

When entertaining relatives and friends, they will try their best to prepare good wine and food. This sentence is generally a modest remark of the host when entertaining relatives and friends.