I would actually argue that the Free Planets Alliance is more representative of the KMT while the Imperials more akin to the CPC. While the Imperials' political ideology is in the complete opposite end of the political spectrum to that of the CPC, they were ultimately the victors of the galactic war. Reinhart ushered in an era of peace and prosperity as his legacy, much like how the CPC did.
If you look backwards in Chinese history, the government was always fundamentally authoritarian, just of different flavours between the hereditary monarchy, or the dictatorship of the bourgeoisie/proletariat. The original three principles of Chinese rejuvenation set out by Sun Yet Sen are basically the democratic ideals that Yang Wen Li is fighting for, only a corrupt government that failed to represent the people perverted these ideals for the benefit of the elite class.
Holy shit, cultured individuals in this forum.
One of the fansubbers for the series and admin of Gineipaedia, the English language wiki for Legend of the Galactic Heroes is in this forum.
The Empire in the series is basically patterned off Imperial Chinese dynasties. The characters draw from a variety of sources and may resemble more than one historical figure. Reinhard for example has many parallels to Alexander the Great of Macedon.