How did reform introduced under the tang dynasty contribute to china's golden age??

wrong subject but here you go:

Explanation:

In the chaos that reigned after the fall of the Han dynasty in 220 C.E., no one knew if a unified China would ever again be possible. Warring clans, political murders, and foreign invaders characterized the next four centuries in which the Three Kingdoms (220-280 C.E.), the Western and Eastern Jin (265-420 C.E.), and the Northern and Southern dynasties (420-588 C.E.) did little to build upon the accomplishments of earlier Chinese culture.

The feuding clans of China were finally united once again in 589 C.E. by Wen-ti and the Sui dynasty (581-617 C.E.), a ruthless leadership often compared to the Legalist Ch'in regime. The Sui dynasty accomplished great feats, including another restoration of the Great Wall of China and the construction of the Great Canal linking the eastern plains to the northern rivers. However, the Sui taxed peasants heavily, and forced them into hard labor. Lasting only 36 years, the Sui dynasty weakened after suffering heavy losses in fighting against Korea. It fell apart when the general population lost faith in the government and revolted.

b) race riots in several cities

answer: to communicate with people on the other side.

explanation: