ㄏㄨㄥˊㄒㄧㄥˋㄔㄨㄑㄧㄤˊhóngxìng‑chūqiáng

红杏出墙
  1. ·不值〉:春色滿園紅杏出牆。」形容春意盎然比喻已婚女子婚外情 妻子貌美如花自己長年奔波在外難免紅杏出牆」。

lit. the red apricot tree leans over the garden wall (idiom)​, fig. a wife having an illicit lover