青梅竹马 
青梅竹马 [qīngméizhúmǎ] green plum and bamboo hobby-horse (idiom); a couple who were friends from childhood; childhood sweethearts 
青 青 blue / - / grow up moon blue 梅 梅 plum / - / tree every plum 竹 竹 bamboo / - / nail bamboo 馬 马 horse / team of horses/carriage / mane walking stick tail feathers horse