莫逆于心

Explanation: They have no conflict. Refers to the same emotions, mind congenial 　　Usage: Partial official; as predicate; that same emotion, mind congenial 　　Source: Qin Zhuang, "Great Master Zhuang": "Three to smile, intimate in mind, then phase as a friend." Thesaurus:  a friend until death, A friend in need is a friend indeed., ties between friends willing to sacrifice even life for each other, The world is but a little place, after all., Sworn brothers and sisters The contract, click, Qingshenyihou, Yi Results sworn brothers and sisters Antonym Group:  only slightly acquainted with (a person), have met only once, Side of the Ya, To sever friendship Sub-Block, Guan Ning to sever friendship