In the second year of his residence (AD 7), in addition to five baht, Wang Mang cast "five thousand with one knife", "five hundred with one knife" and "fifty with a big spring". After the establishment of the New Dynasty, Wang Mang abolished "five thousand", "five hundred" and five baht in the first year of the founding of the People's Republic of China (AD 9), and issued "Junichiro Koizumi" instead of five baht. In the second year of the founding of the People's Republic of China (AD 1), a treasure system with 28 products was implemented, in which 4 strong springs, 3 middle springs, 2 young springs and 1 Yao springs were added between "Daquan 5" and "Koizumi Naichi", which were collectively called "six spring products" (that is, six in the upper part of the figure). In the first year of Tianfeng (AD 14), the fourth reform was carried out, and goods cloth and goods springs were used instead. Dihuang two years (AD 21) or so, follwed also cast a cloth spring. Wang Mang's monetary reform did not solve the social contradictions at that time, which aggravated the chaos of finance and finance. However, its currency was beautifully made, its calligraphy was exquisite, and some of it was wrong gold, which was a masterpiece among ancient coins.