Dating tibetan coins
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Some of these first forms of money were cast in shapes which resembled tools of the time such as spades or shovels 圆钱).
China was among the first countries in the world to use money as documented by historical records and actual artifacts dating back 4,000 years.
By the time of the Shang Dynasty (16th ~ 11th century BC), sea shells (cowrie) were already circulating as a major form of currency.
This form of money is known as "ant nose" When Qin Shi Huang unified the country in 221 BC and established the Qin Dynasty, he abolished the above-mentioned forms of money that had been circulating in the other Warring States and stipulated that the legal coinage would be a round coin with a square hole in the center weighing a half tael or .
This basic coin shape was adopted by subsequent dynasties and continued to be cast in various forms for more than 700 years.