齐qí心xīn协xié力lì

Literal: to align hearts and join forces
Figurative: To pull together with one mind and one effort, everyone working toward the same goal to get something done.

Where does 齐心协力 come from?

It does not come from a particular tale: it is a set phrase made of two parallel halves that say the same thing from two angles, 齐心 ("to bring hearts into line") and 协力 ("to join forces") — shared will first, then shared work. Very close variants with the same structure circulate as well, such as 同心协力. Today it turns up mostly in team, workplace, and news language, whenever people are asked to cooperate on something big.

How is 齐心协力 used? Two examples

只zhǐ要yào大dà家jiā齐qí心xīn协xié力lì，这zhè个ge项xiàng目mù一yī定dìng能néng按àn时shí完wán成chéng。
If we all pull together, this project will be finished on time, no question.
那nà年nián发fā大dà水shuǐ，全quán村cūn人rén齐qí心xīn协xié力lì守shǒu住zhù了le堤dī坝bà。
The year of the big flood, the whole village pulled together and held the levee.

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