禮尚往來（禮尚往來）　

◎ 禮尚往來 lǐshàngwǎnglái

[courtesy demands reciprocity; deal with sb. as he deals with you; pay sb. back in his own coin] 在禮節(jié)上注重有來有往,借指用對方對待自己的態(tài)度和方式去對待對方

禮尚往來,往而不來,非禮也;來而不往,亦非禮也。——《禮記·曲禮上》