I've seen a few SKS's that were made by Russia for Chinese use that had the blade bayonet here at the Wholesale Sports in Winnipeg. I am not sure if that's what you mean.
easiest is to buy a chinese and buy a russian blade and swap it lol. make your own
They were not only using russian machines but spare parts to.
They weren't made by Russia. They were made in China, by the Chinese, using Russian machinery that was given to them by the Russians.
I've never heard of this, but I'd like to learn more about it.