回头 + Verb
回头 (huítóu) means to turn one's head or to look back. It is commonly used to describe the physical action of turning around to glance at someone or something, and can also imply reconsidering or returning to a matter later.
他听到有人叫他,回头一看,原来是老同学。
tā tīng dào yǒu rén jiào tā, huí tóu yī kàn, yuánlái shì lǎo tóngxué.
He heard someone calling him, turned around, and saw it was an old classmate.
她走了几步又回头看了我一眼。
tā zǒu le jǐ bù yòu huí tóu kàn le wǒ yī yǎn.
She walked a few steps, then turned back and glanced at me.
这件事我们回头再讨论吧。
zhè jiàn shì wǒmen huí tóu zài tǎolùn ba.
Let's discuss this matter later.