coins have two types: empty cloth and peaceful cloth. Then knife coins can be roughly divided into two categories according to the circulation area.
is the northern sword coins, with many types. In terms of style, it can be divided into needle head knife, pointed head knife and bright knife with huge unearthed amount, straight knife , etc.


tip first knife

ming knife

straight knife
Another type is the eastern Qidao . It is huge in size, with high and straight characters, exquisite castings, and has few remaining characters in the world. According to the number of characters on the knife, it is divided into six-character knife, five-character knife, four-character knife, and three-character knife. Among them, the text on the six-character knife is , Qihongbang Changfahua . It means to establish a country or re-establish a country, and it is obviously minted for commemoration. This should be the earliest commemorative coin in my country's history.

Qi three-character knife
Qihuibang Changdao has always attracted much attention because of its most inscriptions and special significance, and its existence is rare. In 2011, Jiade Spring Auction, a Qihuibang Changdao 's back "Sun" six-character knife was finally sold for 1.495 million yuan, setting a auction record for Qidao.

6 characters of swords and returns to the country to grow big swords
The late spring and autumn to the Warring States Period , in addition to 小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小
There are differences on the source of round coins. One theory is evolved from the spinning wheel of hand tools, and the other theory is developed from ancient jade bi.

Warring States Jade Bi
Early round coins were round holes

round coins
Later round coins were square holes, there are Wenxin and Chang'an , two steroid three types
Wenxin said that it was cast by Wenxinhou Lu Buwei , Chang'an was cast by Qin Shihuang younger brother Chang'an Jun .
In 239 AD, Chang'an Jun was ordered to attack Zhao Guo , but he turned against him halfway and returned to Chang'an, but he was eventually killed in failure. Shortly after the failure of Chang'an Jun, Lu Buwei was also sentenced to death. It seems that Chang'an Jun's mutiny was a conspiracy with Lu Buwei, with the purpose of replacing Qin Shihuang's victory, but there is no conclusive evidence. This is all a speculation and full of mystery. Just like the relationship between Lu Buwei and Qin Shihuang's life experience, it is shrouded in many unsolved mysteries.

Wenxin

Chang'an
Two steroids in the steroids were a unit of weight at that time, that is, six zhu, twenty-four zhu, one liang, twelve zhu is and half liang , one stear is six zhu, and two stearoids are exactly twelve zhu, so the two stearoids and half liang liang are actually equal.

square hole round coins and two steroids
The reason why ancient Chinese currencies were finally unified in half a liang of coins was because Qin unified the six countries. Qin used half a tael of coins from its own country to unify the currencies of the six countries.
Half a liang of qian is smaller in shape, but it is very distinctive. In order to show your importance to the work of unifying currency, Prime Minister Li Si personally wrote the words "Half-two" in Xiaozhuan . Li Si was a famous calligrapher in ancient times, but his handwriting had been severely deteriorated. We can only appreciate Li Si's original works through the words on half a liang of coins.

Qin Banliang
Half liang qian developed from round hole round coins to round square holes, establishing the currency system of my country and even the entire East Asia for more than two thousand years after Qin. It has far-reaching influence and great significance. Why change from round holes to square holes?
The rulers of the Qin Dynasty believe that the outer circle symbolizes the destiny of heaven, and the inner square represents the imperial power. The money is made into this shape, symbolizing the rule of the world and the imperial power is supreme. The sky is round and the place is round!
How much does Qin Banliang cost? What can one and a half taels buy?
One pound in the Qin Dynasty was about 250 grams, one pound was 16 taels, one pound was 24 zhu, and one zhu was about 0.65 grams of the current one. Therefore, the standard weight of Qin half liang should be about 8 grams. However, the surviving half a liang of qian varies in weight, with the heavier being more than 10 grams and the lighter being only more than 1 gram.
Qianqiu only has Great Wall ,
no see Qin Shihuang back then,
not only half a tael,
once saw Liu Xiang enter Xianyang .
At that time, the prices were very low. In normal years, each stone millet cost about a few dozen coins, and a dou of only three Qin and half a tael was enough. The Pei County minor official Xiao He was given two and a half taels of extra money to help the minor official Liu Bang . After Liu Bang became emperor, he divided the extra two thousand households than other marquises.