Ah, the enigmatic Chinese pattern coins. They
DO exist, but I'd highly suspect this is a common forgery. Looking around the web, this exact design pops up multiple times, whilst the others almost never appear at auction, or haven't over the last 2 decades at least. The mintages were likely single or very low double figures for them.
You'd need to send it to a grading company to be sure, as they will be some of the only people who have handled the real ones, but I'd say it's 99.9% a poor fake.
https://www.pcgsasia.com/popdetail/4787/tab3?l=en
Look towards the bottom at PN-151 to 153.