待到来日有缘能再相逢饮酒
[dài dào lái rì yŏu yuán néng zài xiāng féng yĭn jiŭ]
Translating roughly into 'Waiting for another fateful day when we might meet again and have wine together', it's a hopeful farewell wish which carries an ancient romantic flavor, signifying anticipation for reuniting in the future.