chinese

Recently picked up a Type 54 from a pawn shop, but I'm not familiar with the marks on them. Tried googling, but to no avail. So here I am, asking if anyone knows what this means. Excuse the unfinished integral behind that last picture.

I have a Screw in Yugo sks barrel. Would this fit a screw in Chinese sks?

https://www.youtube.com/watch?v=fXpjSsyr6Jk As far as I know this is the only shooting footage of the Hanyang 88. Definitely obscure and it takes some work to shoot it safely but still worth it. The last few inches of rifling at the muzzle is totally gone but I did not counterbore or modify...