When was the prosperous time of the Tang Dynasty?

The prosperous period of the Tang Dynasty is the most glorious chapter in the long history of the Chinese nation, which began in the first half of the seventh century and ended in the middle of the eighth century. The Tang Dynasty was characterized by clear politics, ideological emancipation, abundant talents, vast territory, consolidated national defense and national harmony, and its image in the world was unparalleled. Today, overseas Chinese are still called "Tang people". The Tang Dynasty was a glorious period in the ancient history of China, which once illuminated the whole world with its own brilliance. During the prosperous Tang Dynasty, China, a country rich and strong, spread the ancient and splendid Chinese civilization to all parts of the world through the Silk Road from Chang 'an, the capital, to the Mediterranean coast, and monarchs, envoys, businessmen, monks, students, craftsmen, doctors and Hu Ji from all over the world came in droves. Once they entered the territory of the Tang Empire, they all envied those prosperous cities. The prosperity of China at that time was very obvious, and America and Africa basically belonged to the "sleeping continent" (except North Africa); Europe was in the early days of the Frankish kingdom, and the trauma of the decline of the Roman Empire caused by barbarian invasion could not be repaired. Asia is regarded as the rich East. Due to the rapid rise of the Arab Empire and the long-term wars with Byzantium, Persia, India and other countries, neither West Asia nor South Asia can be calm. Only China won unprecedented unification in the 7th century and made unprecedented achievements in politics, economy and culture.