Roughly, it means: eating mooncake is like chewing the full moon, inside the mooncake there is ghee and syrup mixed with the filling, silently savoring the taste of it, remembering the loved ones far away, tears stained hand towel.

Mooncake

Su Shi of the Northern Song Dynasty

The small cake is like chewing the moon, with ghee and syrup inside.

The mooncake is like chewing the moon, with pastry and syrup in it.

Syrup: syrup made from malt, sugar dilution. Towel: textile used for wiping, wiping, wrapping, covering, etc., here refers to the hand towel or handkerchief used to wipe tears.

Expanded Information

Mooncake" Background:

During the Northern Song Dynasty, mooncakes were popular in both the court and the private sector, but at that time, mooncakes weren't called mooncakes, they were called "small cakes" or "moon balls".

The author of the song "mooncake" praised its flavor "small cakes such as chewing the moon, there are crispy and syrup".

Or because the author's fame is too big, this poem spread far and wide, and gradually the name "moon cake", and some people even called Su Dongpo "the father of the moon cake". As history progressed, eating mooncakes on Mid-Autumn Day became a common custom.

Baidu Encyclopedia - Mooncakes