Paper Money
It is so common in out everyday life that we hardly give a thought to the fackt that it had to be invented by someone.
Around 650 AD (po kr.), the emperor of China began to issue paper "value tokens" for general use. The first paper banknotes appeared in China about 806 AD. Its original name was 'flying money' because it was so light it could blow out of one's hand. As Marco Polo reported enthusiastically in 1275, "I tell you that people are glad to take these tokens, because wherever they go in the empire of the great Khan, they can use them to buy and sell as if they were pure gold".
Yet paper money did not succeed. By the 15th century China had more or less given up paper money. Over this period, paper notes grew in production to the point that their value rapidly depreciated and inflation soared. Then beginning in 1455, the use of paper money in China disappeared for several hundred years. This was still many years before paper currency would reappear in Europe, and three centuries before it was considered common.
Europeans had to wait until the 17th century when Sweden took the lead in issuing paper currency. Other countries gradually followed the Swedish example. (The first Western money was issued in Sweden in 1661. America followed in 1690, France in 1720, England in 1797, and Germany not until 1806.)
Medicine. Blood circulation
China, Second Century BC.
Most people believe blood circulation was discovered by William Harvey in 1628, it appears that he is wrongly credited for this discovery. There are other recorded notations dating back to the writings of an Arab of Damascus, in 13th century. However, circulation was first discussed in full and complex form in The Yellow Emperor's Manual of Corporeal Medicine in China by the second century BC.
This proves that Chinese medicine is also based on precise