好聲行 [－声－]

Jyutping hou2 seng1 haang4
Pinyin hǎo shēng xíng

Definitions (CC-CANTO)
  1. “take care”, an expression used when the host walks the guests out to the door when parting [colloquial]
Definitions (粵典–words.hk)
  1. 語句
    提醒​熟人​離開果​陣要​小心​嘅​用​語
    an expression telling someone to take care when they are leaving