During the postclassical era china was the first to

Emperors ordered construction of palaces, repairs of defensive walls, sent millitary forces to central Asia and Korea.

Explanation:

Post Classical China.

Ruled by Yang Jian.

Centralized government.

Emperors ordered construction of palaces, repairs of defensive walls, sent millitary forces to central Asia and Korea, levied high taxes, and demanded labor services.

Strictly speaking, Classical Chinese refers to the written language of the classical period of Chinese literature, from the end of the Spring and Autumn period (early 5th century BC) to the end of the Han dynasty (AD 220).

Qin Emperor Shi Huangdi began the tradition of bureaucracy in China, appointing people he thought were city to run society, as opposed to wealthy aristocrats. Originally used as a measure to prevent revolt, Shi Huangdi's appointed bureaucrats appointed other bureaucrats under them to run things on a more local level.