巧詐不如拙誠 [－诈－－－诚]

Jyutping haau2 zaa3 bat1 jyu4 zyut3 sing4
Pinyin qiǎo zhà bù rú zhuō chéng

Definitions (CC-CEDICT)
  1. the unvarnished truth is better than a cunning ruse (idiom)
  2. honesty is the best policy