青梅竹馬

Green; blue; black; youth; young; short name for Qinghai province or Qingdao city.

Plum or Japanese apricot tree; plum blossom; surname Mei.

Bamboo; a plant with hollow, jointed stems; also used for musical instruments like flutes or whistles; also refers to ancient bamboo slips used for writing; also a surname.

A horse; a knight in chess; a surname; a counting tool; a radical in Chinese chess.