「幕後主腦」

(pos:名詞)
<explanation>
yue:喺背後，唔俾人察覺咁指揮或者操縱一切（量詞：個）
eng:the master-mind, the power behind the scenes
<eg>
yue:過咗十年，警察終於查到呢單兇殺案嘅幕後主腦係邊個喇！ (gwo3 zo2 sap6 nin4, ging2 caat3 zung1 jyu1 caa4 dou2 ni1 daan1 hung1 saat3 on3 ge3 mok6 hau6 zyu2 nou5 hai6 bin1 go3 laa3!)
eng:After 10 years of investigation, the police can finally figure out the man behind this murder case.