码长城 mǎchángchéng to play mahjong Origin Definitions Defs Strokes Stroke Words Sentences Sents 码 碼 mǎ noun to stack to pile up; to stack one on top of another; to arrange in a neat pile长城 長城 chángchéng impregnable defense an unbreakable power, barrier, or fortress; can also refer to one's own status or position (figuratively) the mahjong wall