Type 56 carbines with serial numbers below 9,000,000 have the Russian-style blade-type folding bayonet, while those 9,000,000 and higher have a "spike" type folding bayonet. Some early examples are known as "Sino-Soviet", meaning they were produced by China, but with cooperation from Russian "advisers" who helped regulate the factories and provided the design specifications

the rifle in the photo is not the original one for sure