闷声发大财
（men1 sheng1 fa1 da4 cai2）
This phrase means not to stir things up and succeed with what you have at hand. This goes hand in hand with the chinese culture and is often used b yh politicians to ease the public. One famous politician that used this was ex president Jiang ZeMin.
In another way, it can also mean for you to succeed without boasting. The first two words directly translates to "muffled" while the last three words translates to "becoming rich". This can be used as a friendly advice to a friend or family member who loves to boast!