進退有常

to advance or retreat, each has its rules (idiom from Zhuangzi); many translations are possible

to go forward / to advance / to go in / to enter / to put in / to submit / to take in / to admit / (math.) base of a number system / classifier for sections in a building or residential compound

to advance or retreat / knowing when to come and when to leave / a sense of propriety

to retreat / to decline / to move back / to withdraw

to retreat; to withdraw / to reject; to return (sth) / to decline

to have; there is / (bound form) having; with; -ful; -ed; -al (as in 有意[you3 yi4] intentional)

surname Chang

always / ever / often / frequently / common / general / constant