桴 ㄈㄨ ˊ fú 鼓 ㄍㄨ ˇ gǔ 相 ㄒㄧㄤ xiāng 应 ㄧㄥ ˋ yìng 桴 ㄈㄨ ˊ fú 鼓 ㄍㄨ ˇ gǔ 相 ㄒㄧㄤ xiāng 應 ㄧㄥ ˋ yìng lit. the hammer fits the drum (idiom); appropriate relation between the different parts closely interrelated