You are welcome.
Also your coin is 15% low weight.
Another very common attribute among Chinese fakes.
17% to 20% low weight is often found.
Here's a tip about spot checking your coins at home:
Go online to places that sell neodymium N-52 magnets.
Get a couple small round magnets, grip them together and suspend them on a string.
Approach the suspended magnets with your coin and look for a diamagnetic reaction.
If the coins stick, they are not good coin silver.
If nothing happens they are not good coin silver.
If you do make the suspending magnets, they should look something like this. And if you have many Chinese coins like you have had so far, it can be useful to see for yourself one way to test for coin silver at home.