The crucial period of Chinese history, 220-960, falls naturally into contrasting phases. The first phase, also known as that of "early medieval China," is an age of political decentralization. Following the breakup of the Han empire, China was plunged into civil war and fragmentation and stayed divided for nearly four centuries. The second phase started in 589, during the Sui dynasty, when China was once again brought under a single government. Under the Sui, the bureaucracy was revitalized, the military strengthened, and the taxation system reformed. The fall of the Sui in 618 gave way to...

The crucial period of Chinese history, 168-979, falls naturally into contrasting phases. The first phase, also known as that of 'early medieval China, ' is an age of political decentralization. Following the breakup of the Han empire, China was plunged into civil war and fragmentation and stayed divided for nearly four centuries. The second phase started in 589, during the Sui dynasty, when China was once again brought under a single government. Under the Sui, the bureaucracy was revitalized, the military strengthened, and the taxation system reformed. The fall of the Sui in 618 gave way to...