Actions speak louder than words.

事实胜于雄辩。

Adversity leads to prosperity.

穷则思变。

Adversity makes a man wise, not rich.

逆境出人才。

A fair death honors the whole life.

死得其所，流芳百世。

A faithful friend is hard to find.

知音难觅。

A fall into a pit, a gain in your wit.

吃一堑，长一智。

A fox may grow gray, but never good.

江山易改，本性难移。

A friend in need is a friend indeed.

患难见真情。

A friend is easier lost than found.

得朋友难，失朋友易。

A friend is never known till a man has need.

需要之时方知友。

A friend without faults will never be found.

没有十全十美的朋友。

'After you' is good manners.

“您先请”是礼貌。