be severe with oneself and lenient towards others

yán yú lǜ jǐ kuān yú dài rén ㄧㄢˊ ㄩˊ lv4 ㄐㄧˇ ㄎㄨㄢ ㄩˊ ㄉㄞˋ ㄖㄣˊ