“不是猛龙不过江” ？ perhaps. means that all men who cross the river are very brave

不是猛龙不过江！ The Literal meaning is: bu shi:not ; meng long :brave dragon; bu guo jiang: not (choice) to cross the river; The Figurative meaning: The one can face the challenge and win must be a brave people!Or just the brave people have the courage to challenge and adventure.

after toto's answer: brave as a dragon,have you ever heared of "dragon"?we chinese are the descendants of dragon.

Literal meaning: Only powerful Chinese dragon could cross the river Figurative meaning: Only the courageous person will overcome the very hardship and do great deeds..

literal meaning is what hanyang says and figurative meaning is what shelia says