礼尚往来 (lǐ shàng wǎng lái): Fig. return politeness for politeness — Meaning & Stroke Order

Don't you think that in interpersonal relationships, returning politeness for politeness is the key to maintaining balance?

Reciprocity between friends makes the relationship closer.

He never follows the convention of returning politeness for politeness, thus gradually losing the trust of his friends.

We take turns hosting the weekend gatherings, and this arrangement of returning politeness for politeness makes everyone feel at ease.