鹬蚌相争，渔翁得利

two dogs fight for a bone, and

玉不琢，不成器

A piece of jade unless cut forms no article of vertu. / E: An uncut gem goes not sparkle. / The finest diamond must be cut. / Unpolished pearls never shine.

十年树木，百年树人

It takes ten years to grow a tree and a hundred years to bring up a generation of good men. / E: It takes three generations to make a gentleman.

学无止境

knowledge is infinite / E: progress sometimes uses a comma, but never a full stop.

此地无银三百两

never try to prove what nobody doubts.

严师出高徒

Good pupils are to be brought up by strict teachers. / E: It is the bridle and spur that makes a good horse.

得不偿失

give a lark to catch a kite.

对症下药

a disease known is half the cure.

君子之交淡如水

a hedge between keeps friendship green.

化干戈为玉帛

bury the hatchet.