«秦晋之缘»

qínjìnzhīyuán

(1)[close ties for generations through matoimonialdiplomacy]: 春秋时秦、 晋两国世代互为婚嫁结为姻亲, 后称两姓联姻、 婚配的关系为"秦晋之缘"

(2)[a congratulatory expression on wedding]: 亦称"秦欢晋爱", "秦晋之好"