I needed to find out from when the Shenyang Mint in China started it's production, because of this documentation:
and it seems not to be exactly correct: https://en.numista.com/forum/topic151393.html#p1192267, so I tried to find it via the link in Numista
Unfortunately, that is no longer valid!
The mint seems to have existed much longer:
How can we make the robot check the links in numista for validity?