【水乳交融】〖shu r jio róng〗[get along swimmingly with each other; be in perfect [complete] harmony; blend as well as milk and water; completely blended like milk and water -- in complete harmony]

水鱼亲密夫妻情，

乳虎出林蜚英腾。

交并感佩凝寰宇，

融为一体世大同。

像水和乳汁融合在一起。比喻感情很融洽或结合十分紧密。Like water and milk blend together. Metaphor is affection very harmonious or very close combination. 同：浑然一体、难分难解。反：格格不入、若即若离。谜：奶茶、冲奶粉。