来而不往非礼也
it is impolite non to teeiprocate;one should return or.give as good as one gets;it is ordy Proper to repay in kind
来而不往非礼也lái ér bù wǎnɡ fēi lǐ yě
有来无往,不符合礼仪。one should return as good as one receives, one should give as good as one gets, Courtesy on one side only lasts not long.