Pop Chinese:若要人不知，除非己莫为

Click the link below to like and subscribe our Facebook fan page, 

https://www.facebook.com/hschinese

ruò yào rén bù zhī，chú fēi jǐ mò wéi

若 要 人 不 知，除 非 己 莫 为。

The day has eyes, the night has ears.