In the second year of the Tang Dynasty (AD 759), Shi Siming occupied Luoyang, the eastern capital, and called himself Emperor Dayan. He melted the bronze Buddha in the local temple to make coins. Because of the title of "Deyi", Qian Wen was originally designated as "Deyi Yuanbao". Take the meaning of "the sky is clear and the land is flat, and the princes are loyal to the world". Available for less than a year, Shi Siming felt that "Ti Yi" seemed to imply that his "Great Yan Dynasty" could only last for one year, which was unlucky, so he ordered to stop the circulation of Ti Yi's gold ingot. In order to flaunt that he obeyed God's will and rebelled against the Tang Dynasty, Shi Siming named the year Shuntian and cast "Shuntian Yuanbao". Shuntian Yuanbao has the same shape and color as Deyi Yuanbao. But "Shun Tian" was not smooth, and Shi Siming did the opposite, causing widespread indignation and resentment. He died shortly after he ascended the throne. The "Anshi Rebellion" was quickly put down, and "Deyi" and "Shuntian" failed to circulate for a long time. Therefore, there is a saying in the coin world that "it's easy to get it in good times, but it's rare to get one." "Deyi" and "Shuntian" are both worth 100 yuan, but you have to pay 100 yuan for "Kaiyuan Bao Tong". The rebels' intention of profiteering and collecting money is obvious.