Do you have friends who know about coins?

Ancient coins refer to coins of ancient metals and their derivatives.

Ancient coins include all kinds of coins in the pre-Qin period and all kinds of square hole coins after Qin and Han dynasties. The casting period of square hole coins lasted until the late Qing Dynasty and the early Republic of China.

In fact, real money in the pre-Qin period, such as seashells in the Xia and Shang Dynasties, imitated shells (goods);

Metal-weighed coins, such as copper blocks in the Western Zhou Dynasty, also belong to the category of ancient coins.

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This is the copper coin used in ancient Taoist divination.

It doesn't look real. There are many signs of aging.