China is a great power and a major regional power within Asia, and has been characterized as a potential superpower.
The Xianbei unified them as the Northern Wei, whose Emperor Xiaowen reversed his predecessors' apartheid policies and enforced a drastic sinification on his subjects, largely integrating them into Chinese culture.
In the south, the general Liu Yu secured the abdication of the Jin in favor of the Liu Song.
However, they fell quickly when their conscription for public works and a failed war with Korea provoked widespread unrest.
In 907, the Tang disintegrated completely when the local military governors became ungovernable.
Between the 10th and 11th centuries, the population of China doubled in size to around 100 million people, mostly because of the expansion of rice cultivation in central and southern China, and the production of abundant food surpluses.