少年老成 (siu3 nin4 lou5 sing4) — an old head on young shoulders; a young person lacking in vigour and drive in Cantonese
siu˗₃少ninˎ₄年louˏ₅老singˎ₄成Mandarin Pinyin: shao4 nian2 lao3 cheng2
Meaning of 少年老成
nounan old head on young shoulders; a young person lacking in vigour and drive