Li Xin

The drama tells the story of Zheng Daqian (played by Qi Jiuzhou), the deputy captain of the Anti-Fraud Center in the west of the city, and Zhong Yi (played by Zhang Yijie), a newly recruited police officer, who join forces to solve multiple fraud cases and develop a deep master-apprentice relationship in the process.

In 1935, the Nationalist Government, in order to prepare for the logistics and economy of long-term warfare, forcibly introduced legal tender and stopped the use of silver dollars, military notes, customs gold notes and other currencies, making preparations for resisting the Japanese invasion of China. In response to this, the Japanese military secretly produced a large amount of counterfeit legal tender in Harbin, disrupting the financial and trade order. The Japanese army called it the "Black Cat Project"