Cold window: reading in the cold window in winter. Describe years of hard work.

Description: Describe studying hard for many years.

Structure: some formal idioms

Part of speech: neutral idioms

Source: Qi's "Gui Qianzhi" Volume 7: "The ancients did not ask under the window for ten years and became famous in one fell swoop."

Example: A man over there frowned and sighed "~". -Wei Wei's street sign

Usage: as object and attribute; Study hard behind closed doors for ten years

Synonym: ten years under the window, ten years under the cold window.