Literature Reference: 三贤事汉灭暴彊，四贤镇岳宁边徼。—— 《和李校书新题乐府十二首 五弦弹》 Three sages served Han to quell tyranny, and four sages guarded the mountains to pacify the frontiers. Source from 'He Li Xiaoshu Xin Ti Yuefu Shi Er Shou Wu Xian Tan'.
事: Matters, affairs, and events.
汉: The name of a river, the Han River, the largest tributary of the Yangtze River. It extends to signify vastness, benevolence, open-mindedness, and magnanimity.
Meaning: Serving the Han dynasty with loyalty and dedication to national stability and prosperity.