Literature Reference: 云门骇听，雷鼓鸣空。—— 《郊庙歌辞 祀圜丘乐章 雍和》 The sound of Yunmen startles the ears, while the thunderous drums echo in the sky. Source from 'Jiao Miao Ge Ci Si Yuan Qiu Yue Zhang Yong He'.
云: White clouds, soaring high in the sky. In names, it often symbolizes lofty aspirations, propelling one's career to greater heights.
门: Method, knack.
Meaning: Yunmen symbolizes loftiness and mystery, representing freedom like clouds and the gateway to wisdom and opportunities.