塞翁失马，焉知非福Misfortune may be an actual blessing.
三十而立"A man should be independent at the age of thirty.
At thirty, a man should be able to think for himself."
升级换代updating and upgrading (of products)
四十不惑Life begins at forty.
谁言寸草心，报得三春晖"Such kindness of warm sun, can't be repaid by grass. "
水涨船高When the river rises, the boat floats high.
时不我待Time and tide wait for no man.
杀鸡用牛刀break a butterfly on the wheel
实事求是seek truth from facts; be practical and realistic; be true to facts
说曹操,曹操到Talk of the devil and he comes.
实话实说speak the plain truth; call a spade a spade; tell it as it is
实践是检验真理的唯一标准Practice is the sole criterion for testing truth.
山不在高，有仙则名"No matter how high the mountain is, its name will spread far and wide if there is a fairy; "
韬光养晦hide one's capacities and bide one's time
糖衣炮弹sugar-coated bullets
天有不测风云Anything unexpected may happen. a bolt from the blue
团结就是力量Unity is strength.
“跳进黄河洗不清”"eve if one jumped into the Yellow River, one can not wash oneself clean--there's nothing one can do to clear one's name "
