ㄑㄧㄥㄇㄟˊㄓㄨˊㄇㄚˇqīngméi‑zhúmǎ

青梅竹马
  1. 〉: 竹馬青梅同居。」青梅竹馬形容男女小時一起遊戲天真無邪

lit. green plums and hobby-horse (idiom)​, fig. innocent children's games, childhood sweethearts, a couple who grew up as childhood friends
Jugendliebe (S)​