Twenty one-yuan coins were about four centimeters thick.

The weight was also much heavier than the copper coins.

According to the measurement method, a copper coin was about only 3 grams.

Even if it was a fake one, the weight wouldn’t make much of a difference.

However, the one-yuan coin had a steel core and nickel with a diameter of 25 mm and a thickness of 1.85 millimeters, weighing at 6.1 grams.

It meant that the ...