As if the metal would be 'bad'?
#1 I dont think the small quantity of tooling sent to china would be responsible for the entire production line/lines, especially in 1964 with Jianshe /26\s enormous capacity. Its easy to forget that the chinese INVENTED the gun AND black powder. The Chinese were making firearms a looooooooong time prior to the SKS. In other words... It would be ridiculous to think China relied solely on Russian machinery to produce the T56. In fact, as time went on, they further developed new ways of doing things as evident by a later completely dif receiver, cast parts, pinned barrels etc.
#2 Although the theory of Romania possibly being sent the same aid in production startup, I have never seen any evidence. Please share if you know something I do not.
The barreled actions shown in the pics above are identical in every form and fashion to a Russian minus the inspection stamps.