明修栈道，暗渡陈仓 / 明修棧道，暗渡陳倉
míng xiū zhàn dào , àn dù chén cāng
Meaning
- literally repair the plank road by day while secretly crossing the Wei River 渭河 Wèi Hé at Chencang (idiom, refers to a stratagem used by Liu Bang 刘邦 Liú Bāng in 206 BC against Xiang Yu 项羽 Xiàng Yǔ of Chu)
- figuratively to feign one thing while doing another
- to cheat under cover of a diversion