「先小人後君子」

(pos:語句)
<explanation>
yue:開頭免去客套，講清楚條件先，按章辦事，然後再講禮貌
eng:to set clear expectations before being generous; literally: be a scoundrel before being a gentleman
<eg>
yue:先小人後君子，規矩點都要講明嘅。 (sin1 siu2 jan4 hau6 gwan1 zi2, kwai1 geoi2 dim2 dou1 jiu3 gong2 ming2 ge2.)
eng:Be a scoundrel before being a gentleman—we have to clearly state the ground rules first.