Hudong Galaxy

The third sphere centered on the Earth's airspace has long been unsuitable for human habitation. Humanity has recorded and stored all the achievements of human civilization on the third sphere and rushed to the fourth sphere. It has lived on the third sphere centered on the Mars airspace for 3 billion years. At this time, human civilization on the third sphere is highly developed. Material wealth is extremely abundant and spreads all over the fourth sphere. Consumption materials are distributed according to needs; social relations are highly harmonious, human spiritual realm is greatly improved; individuals develop freely and comprehensively.