At the end of the Western Han Dynasty, the "new" coins of Wang Mang's regime had a special shape and consisted of two parts. The upper part was in the form of a square-hole round coin with a diameter of 3 cm, and the face text was the word "national treasure and golden chamber", which was read in a rotating way. The square spring body is connected with the short neck, the side length is 2.8 cm, and there are two straight lines on the body surface and back. Between the lines, the word "Wan Zhi" is hung on a straight book with no words on the back. Xin Mang implemented gold state-owned, ordered the development of gold to the imperial government, and gave it to Wan Zhi, a national treasure, as a voucher. Some people think it is currency in circulation, but it has not officially entered the circulation field because of its high discount. There is also a view that the real thing is not money, but a handle or ornament on the gold cabinet, which symbolizes that Wang Mang holds countless gold. At present, there is only one complete coin in the world, and the other one only exists in the upper part, which has been lost overseas and disappeared. China is one of the "fifty treasures" of ancient currency. In Xin Mang, gold was state-owned, and gold was lost to the imperial court as a voucher to the national treasure Jingui Wan Zhi, which was not circulated. The real thing is now in the Chinese History Museum.
The most valuable copper coin in the history of our country is the ancient copper coin of Synopsis of the Golden Chamber issued by Wang Mang (8-24) in the new dynasty, with a face value of 10,000 pieces of five baht. According to historical records, during the reign of Wang Mang 16 years, due to the emptiness of the national treasury, he carried out four monetary reforms, and every time he changed it, he plundered the people. "National Treasure Gold" was cast by Wang Mang in the last monetary reform, and it is shaped like a gourd. The upper part is round, with square holes, and is cast with the seal character of "national treasure gold plaque"; The lower part is square, and the word "Wan Zhi" is cast on it, and the font is very beautiful; The middle part is a short neck, which connects the upper and lower parts. At that time, 10 thousand yuan and five baht could be exchanged for a catty of gold, and a "national treasure" was worth a catty of gold, which shows that the degree of exploitation is amazing.
Due to its high face value and short issuance time, the money of "State Room Golden State" could not be found before the Qing Dynasty. In the twenty-seventh year of Guangxu in Qing Dynasty (190 1), a farmer in Xi 'an found two pieces on the flat land. One was bought by Zhang Shuxun, an ancient coin collector, and the other was bought by Liu Ma, an Englishman, and then bought back by Max Zhang, a Shanghai coin collector. It was later collected by Chen. On the eve of liberation, Chen moved to Hong Kong. In the early 1950s, the China government spent a lot of money to buy it back, and now it is in the Chinese History Museum.
According to Records of Hanshu Shihuozhi, this national treasure is a combination of two pieces of Fiona Fang. Shangquan is a circular "golden palace of national treasures" with square holes; The lower spring is a square "straight ten thousand". It is said that there are only two and a half pieces left in the world, which is a real national treasure.
In Li Youxian's Gu Quan Hui, there is a square hole with a diameter of about 3 cm at the top of the "national treasure gold" money tray, and the word "national treasure gold" is written on the front of the money; Below is a 2.5 cm square without Kong Quan, and the word "Wan Zhi" is written in seal script on the front of the money. Two dollars are connected into one, which is called "national treasure, money is straight."