少壮不努力，老大徒伤悲

Explanation: g when the light does not work hard and strong, old age, sorrow is useless. 　　Source: "Verse poems long Ge Xing" rivers east to the sea, when the complex Seogwi. Young idler, an old beggar. " 　　Examples: ~, Vladimir hard on weekdays, from Advent to regret. (Ming Zhang Dai "class children read.")