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

Since he invited me to the dinner party, I should reciprocate the invitation, which reflects the social principle of returning politeness for politeness.

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.

In business interactions, reciprocity is the foundation for establishing long-term cooperation.

Despite busy work schedules, we still maintain a deep friendship through interactions that involve returning politeness for politeness.