It's a TGI import from the early batch of Sino-Banians. Could very easily have been scrubbed and forced matched in China Boris. Seems plausible with the serif on the 3's as I can't recall seeing that font on any other Russian guns either. It's pretty distinctive, good eye.
Only the 3's are similar to the Chinese stamps. The other numbers and the Cyrillic letters bear strong resemblances to known soviet fonts.
I heavily suspect that this one ended up in Tirana via Moscow, not China. And the serif 3 stamps probably came from China along with Type 56's, or crafted in Albania. (I'd even go so far to posit that, with the exception of the Soviet-Sino guns [0001 to ~2000], no other "Soviet" guns ended up in the Chinese small arms arsenal).