1. In the fourth year of Wude, Li Yuan changed the monetary system in which "baht" and "Liang" were used as money names in previous dynasties, and made a coin named "Kaiyuan Tongbao". Qian Wen of Kaiyuan Tongbao was written by Ou Yangxun, a famous calligrapher at that time, with eight points and three-body seal script, which is the first record of the name of a calligrapher in Qian Wen.

second, Tang Gaozong introduced "Ganfeng Quanbao" in the first year of Ganfeng (AD 666). Dry-sealed Quanbao is 2.5 cm in diameter, with official script, rotary reading, bare back, pure copper and good casting.

Third, An Lushan and Shi Siming, two rebel generals, also issued coins "Deyi Yuanbao" and "Shuntian Yuanbao". Although An Lushan and Shi Siming, who directed this change, have long since vanished into thin air, they have cast Deyi Yuanbao and Shuntian Yuanbao from time to time, and this pair of short-lived money is also a witness to that period of history.

fourth, in July of the first year of Ganyuan in Tang Suzong, "Ganyuan is a treasure" was cast. Ganyuan Chongbao Qianjing is 2.7 cm in diameter and weighs 5.97 grams. It is a Qian Wen official script, which is read in sequence. Its calligraphy is exquisite, with bare back and leaning over the moon, rosefinch, wearing auspicious clouds or stars.

5. Tang Daizong seems to have cast a "Dali Yuanbao" during the Dali period. There is no explicit record in the history books, but there are real objects handed down from generation to generation. This money is 2.3 cm in diameter, and it is a small flat money with no text on its back, which is read in Qian Wen official script.

sixth, there are "Jianzhong Tongbao" and "Xuanbao" handed down from generation to generation. "Jianzhong Tongbao" has a diameter of 2.1 cm and a weight of 1.8-2 grams. It is written in official script in Qian Wen, with a bare back and no text. "Opening Xuanbao" is the last kind of money in the Tang Dynasty, with a diameter of 2.2 cm and a size similar to that of Ganyuan Chongbao Xiaopingqian. Qian Wen is a official script with a bare back. According to historical records, it was cast by Guiyang Qian Jian, and the number is very small. Because its Qian Wen is a "mysterious treasure", it is generally considered as merit money, which was cast for the joy of Tang Yizong, a Buddhist.