Literature Reference: 篱槿花无色，堦桐叶有声。—— 《和太常王卿立秋日即事》 The hibiscus by the fence is colorless, while the leaves of the paulownia by the steps rustle with sound. Source from 'He Tai Chang Wang Qing Li Qiu Ri Ji Shi'.
堦: "Step," as in a staircase or a cloud terrace.
桐: The phoenix tree, known as "wutong" in Chinese, symbolizes vigorous vitality when used in personal names.
Meaning: The paulownia symbolizes nobility and resilience, while the sound of its leaves signifies inner peace and depth.