And the coin will be much older than that.
Face value: a couple of bucks.
Chinese coins really have no relevance (historically/date wise). It'll probably date from the 18th century, (or 200+ years old).
The Chinese treated these coins as, "talismans", "good luck pieces" or the ultimate 'I.O.U.', passed down from their ancestors.
The value of the coin lies in its' provenance, or the rarity of its' original locale.
This is unfortunate, because of 'counterfeiting' in recent years (mostly unintentional).