Xinjing

The third from its star in the star system of the same name, this planet is home to all the major government institutions of the Socialist Union and acts as a de-facto, but not de-jure, capital since the first days of the Socialist Republic of South Saggitarium. Home to over 24 billion sentients, this planet is dominated by humans, although it has sizable keidelian and revossian minorities. It essence not only the unofficially official capital of the Socialist Union, but also the capital of socialist ideals, the only major state to have effectively achieved socialism and kept the system for more than a century.