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In the past two thousand years, China has experienced long periods of unification and centuries of continuous division. The two hundred years of unification and prosperity of the Sui and Tang Dynasties occurred after the long-term division of the Wei and Jin Dynasties. In the era of division, there were many heroes who wanted to regain Jin Mau. Why did the final success fall on the slightly less coquettish Emperor Wen of the Sui Dynasty and Taizong of the Tang Dynasty? People in the Sui and Tang Dynasties invented the world's earliest kaleidoscope, and the civilization of the Sui and Tang Dynasties was as colorful as a kaleidoscope, reaching the pinnacle of Chinese history. The Sui and Tang Dynasties were an era of unity and openness, as well as a romantic and legendary era. The culture of the Sui and Tang Dynasties inherited the essence of China and embraced all rivers. However, behind the prosperity of the Tang Dynasty, there was a crisis hidden after all. After reaching the peak, it would naturally go downhill...