generous with your criticism
Chinese idioms, Pinyin is B ù L ì NC ì Ji à o. The explanation is the kind words of not sparing one's own opinions, hoping to give guidance and asking others for advice. It comes from Lu Xun's book of two places.
The idiom comes from Lu Xun's "book of two places" Five: "but I believe that if you have any help, you will not hesitate to give me advice."
generous with your criticism
When water is wet, fire is dry - shuǐ liú shī,huǒ jiù zào