Just messing around I found that the bolt, bolt carrier, recoil spring, and receiver cover from the Chinese will pop right into the Yugo, and all the aforementioned parts from the Yugo will slide into the Chinese except the receiver cover. I found this rather interesting. Did not live fore these though, but did dry fire them and the hammer, trigger,sear...etc seemed to work fine. I don't think I messed anything up by just doing this?

Would I have messed something up dry firing them like that with different parts?

But I am kinda of curious on live fire now...whether the interchangeable parts from the Yugo would run in the Chinese and vice-versa in the Yugo? Just as long as I used the Chinese receiver cover on both weapons? The Yugo cover only fits the Yugo it seems.