Literature Reference: 'Han' refers to the Milky Way, from 'Shuowen'; 'Guo' means nation, from 'Shuowen'.
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.
国: Nation, capital. In names, it often conveys the meaning of lofty aspirations and extraordinary ambitions.
Meaning: A nation as vast and prosperous as the Milky Way.