Keep your head down
Chinese idiom, Pinyin is m á it ó UG ù y ǐ ng, which means that the pretender peeps at the reaction of the outside world. It comes from Li Zhi's answer to Deng Mingfu in Ming Dynasty.
Idiom usage
As a predicate or attributive; used of people
The origin of Idioms
Li Zhi's answer to Deng Mingfu in Ming Dynasty: "it's not a trivial situation with the world, but a matter of looking into the shadow."
Idiom explanation
It is used to describe the disguiser's reaction to the outside world.
Keep your head down
the three things to use in reading a book -- the eye , the mouth , and the mind - dú shū sān dào
reflect on oneself three times a day - sān xǐng wú shēn