2. Rare ancient coins are the physical objects of monetary history and the witness of history.
3. Therefore, it is necessary to find out its position in history before collection. For example, "Chengdu Jiaozi" and "Ten-text Series Yuanbao Jiaochao" are the earliest banknotes discovered in China so far, which are regarded as priceless by academic circles. Jilin's "Guangping Silver Coin" is considered to be the first machine-made coin in China. The "Cheng 'an Treasure" unearthed in Acheng County, Heilongjiang Province1August, 1985 is a rare "half-white silver coin" product in China.
4. Coins made during the short-lived dynasty or peasant uprising are rare treasures because of their short circulation time and small circulation.