进退有常
jìn tuì yǒu chángjintuiyouchang
- to advance or retreat, each has its rules (idiom from Zhuangzi); many translations are possible
jìn tuì yǒu chángjintuiyouchang
Data from JMdict, KANJIDIC2 (EDRDG), KanjiVG, CC-CEDICT and Make Me a Hanzi. Sources and licences