When you say reproduction, you mean a forgery? Forgeries are produced to con collectors into buying something they believe to be valuable but are in fact worthless! A reproduction would clearly be marked with „COPY“ (unless this is the case in Chinese, which I cannot read), thus you have a forgery here and it is your duty as a good person not to pass it back onto the market and on to further collectors who could believe in its authenticity.
A contemporary forgery, is produced when the coin is in use - to fool people into believing its stated circulation value.
A modern forgery is produced long after the original coin has stopped being traded, when the coin becomes popular and or valuable to collectors.
My assumption from the tell tell details, is that this is a modern forgery - for details of when replicas of this sort were produced, contact Chinese organised crime groups. Or as a general rule anytime from the 1970s to yesterday.
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