China's first known paper bill is called Jiaozi, and can be traced back to the Song Dynasty (960-1279). China's central bank – the People's Bank of China – and the Southwest University of Finance and Economics, have opened a new museum in Chengdu where Jiaozi was first issued to share discoveries and explore the development of China's paper bills. Join CGTN's Xu Xinchen on a trip to the museum, learning about China's financial system and modern Chinese currency.