Time is money.

Explanation: an inch of time is an inch of gold. Metaphor time is very precious. From Don Wang Zhenbai's two White Deer Cave: "Reading is full of spring, and an inch of time is worth an inch of gold. It is not a Taoist who laughs, but Zhou Qing is pursuing it. " The Journey to the West episode 1 1: "It's a pity that an inch of time and an inch of gold can't buy an inch of time. Every inch of gold is still there. Where can I find the past time? "