- 同气连枝 tóngqìliánzhī brotherly bond(literary) tied by the same breath and connected by the same branch; used as a metaphor for the close bond between siblings.
- 同气相求 tóngqìxiāngqiú like attracts likePeople with similar interests or characters naturally gravitate toward one another; like attracts like; birds of a feather flock together
- 同声相应,同气相求 tóngshēngxiāngyìngtóngqìxiāngqiú like attracts likeLiterally meaning that similar sounds resonate together and similar smells attract each other; used to describe how people with similar interests or characters are naturally drawn to one another, gravitate together, and support each other.