chinese idiom

The Chinese idiom to mean [still want to make a success though very old] is: 老驥伏櫪。

老驥伏櫪，志在千里。
means the old horse is resting in the stable, but his mind is thousand miles away.

This idiom is sourced from a poem called 步出夏門行．龜雖壽 by 曹操：「神龜雖壽，猶有竟時。
騰蛇乘霧，終為土灰。
老驥伏櫪，志在千里。
烈士暮年，壯心不已。
盈縮之期，不但在天。
養怡之福，可得永年。
幸甚至哉，歌以詠志。」

曹操幾句詩的意思是：老馬伏在馬廐裏，但志向在千里之外。
有雄心壯志的人雖然老了，進取之心卻沒有停止。

still want to make a success though very old

可能係 : 寶刀未老