Please always provide as much information as possible such as weight, diameter, metal content, etc. when asking about authenticating coins. Quality photographs of both obverse and reverse are absolutely necessary. Having said that, this is a well worn subject here about Chinese fakes of otherwise very sought after and valuable coins. The Chinese are prolific at counterfeiting these and for those prices, we don't even have to bother taking the time to look at them to know what they are. $20 is the first and only red flag needed. https://www.ngccoin.com/resources/counterfeit-detection/top/chinese/