At the end of the prosperous Tang Dynasty during the Tianbao period, Chang'an was the number one city in the world. Hu merchants gathered in the West City, and the Silk Road trade was at its peak. However, the currency system was chaotic (Kaiyuan Tongbao was mainly circulated, silk was still used as currency, and the quality of regional coins varied). Financial tools were primitive (only the prototype of Feiqian, no formal credit institutions). The hidden dangers of the Anshi Rebellion had emerged (Li Linfu was in power, and the border town Jiedu envoy's power was expanded), providing space and risks for financial innovation. The collision between modern financial logic and the traditional business rules of the Tang Dynasty; the interest game between the protagonist and Hu merchants, local gentry business gangs, and the government; the financial turmoil and crisis response caused by the Anshi Rebellion; the confrontation between personal career expansion and the tide of the times.