To accept, adapt to, and live in harmony with the people or environment one currently finds oneself in.

既然已经来到了这个新环境，就要嫁鸡随鸡，尽早适应这里的节奏。

A traditional idiom suggesting that a woman should follow her husband's lead and accept his status, regardless of his character or situation.

俗话说嫁鸡随鸡，嫁狗随狗，她毫无怨言地跟着丈夫去了边疆。