Progress in Chinese starts with characters, then words, finally idioms. Here’s a free look at 「補過拾遺」 and its explanation.
The featured idiom 「補過拾遺」 is explained here, including its meaning and how to use it.
Shiyi: Correct the emperor’s mistakes. To make up for and correct the emperor’s mistakes. It also means to correct and eliminate one’s mistakes and shortcomings.
The Mandarin pronunciation of this idiom is :
bǔ guò shí yí
while its Cantonese pinyin is :
bou2 gwo3 sap6 wai4
The treasure trove of Chinese idioms is extensive, with different expressions suited for various situations. We hope these free resources will aid you in your journey to mastering Chinese.

