Idiom: A lot of people are sweating.

Pinyin: hàn niú chōng dòng

Definition: Dong: Dongyu, house. The cows sweat when the books are transported, and they can be piled up to the roof when stored. Describes a very large collection of books.

Source: "Lu Wentong's Tomb Table" by Liu Zongyuan of the Tang Dynasty: "It is a book, everywhere it fills the building, and when it comes out, it is full of cows and horses."

Synonyms: Picture on the left, history on the right, Countless, vast;

Antonym: very few, only a handful.