The characters combine to form a vivid metaphor: “Take the long, to mend the short.” This elegantly captures the essence of observing someone else's “long” areas (their strengths) and using them to “mend” your own “short” areas (your weaknesses).
取长补短 is more than just a phrase; it's a reflection of deep-seated cultural values in China.
This idiom is formal but extremely common and can be heard in various modern contexts.
The connotation is almost always positive, highlighting cooperation, wisdom, and the potential for growth.