If the stamps on it aren't in English I don't know what to tell you.
Take the top cover off of your gun. Remove the bolt and the firing pin, they will just lift out. (you have to dry fire the gun to release the pin)
Now look inside. If you don't see a "blocking bar" you have a illegal machinegun receiver.
Does it look like this toward the back? With the bar on the left side of the receiver?
Or is there nothing there like in this pic?
If the gun does not have that bar it is illegal. Like 10 in the pen illegal.