In 6 17 AD, Li Yuan, who stayed in Taiyuan in the Sui Dynasty, took the opportunity to attack Chang 'an and died in the Sui Dynasty the following year. He proclaimed himself emperor in Guanzhong, with the title of Tang. Wude spent 1300 years of five baht in four years to cast Kaiyuan Bao Tong. Kaiyuan is the yuan that started the new dynasty, and has nothing to do with the year number of Kaiyuan.

The initial diameter is 2.4-2.5 cm and the weight is 3.8-4.2 g. Zhenguan years, but three or five meters. Since Xuanzong, Qian Wen's four words are slightly less symmetrical. After Dezong, the casting system was rough and lasted for nearly 300 years in the Tang Dynasty. There are many versions and styles. Gold, silver, iron and lead wires are passed down from generation to generation because of the long casting cycle. ?

Extended data

"Bao Tong" is the name of copper coins from the early Tang Dynasty to the late Qing Dynasty. The Tang Dynasty changed the habit of naming coins by weight since Qin and Han Dynasties. In the fourth year of Tang Gaozu Wude (62 1), he abandoned five baht and cast Kaiyuan Bao Tong, with the words "Kaiyuan Bao Tong" on the top, bottom, right and left.

Kaiyuan means to start a new era, and Bao Tong means to "pass on treasures", which has been used until later generations, and the year number, dynasty or country name are often added before the word "Bao Tong".

From the Tang Dynasty, money was no longer named after weight, but changed to treasure. For example, Bao Tong in the Southern Tang and Tang Dynasties, Bao Tong in the Tang Dynasty, Bao Tong in the Song Dynasty, Bao Tong in Yongle in the Ming Dynasty and Bao Tong in Kangxi in the Qing Dynasty. Money called treasure has social significance, that is, the power of money has increased.

In addition to Bao Tong, there are many ancient coins such as Chongbao and Yuanbao (only Bao Tong in the Ming Dynasty). The classification of coins cast in Xianfeng period of Qing Dynasty is the most complicated. Making money is called Bao Tong, five to fifty coins are called treasures, and one hundred to one thousand coins are called ingots. Until the early years of the Republic of China, there were "Bao Tong in the Republic of China" and "Bao Tong in Fujian". It runs through all ages from the early Tang Dynasty to the late Qing Dynasty.

Baidu Encyclopedia-Bao Tong

Baidu Encyclopedia-Jingyuan Bao Tong