I am not comparing K8 with M-346. What I am saying is the the Chinese also have a pod for K8, which allows it to simulate other aircraft. It came out about ten years ago. Let me look for it and I will post it.
An 'integrated flight test simulation aircraft' (IFTSA), equipped with an advanced flight control computer and analogue
fly-by-wire (FBW) system which can mimic the aerodynamic characteristics and flight profile of other aircraft. The pod looks like the smoke generator pods used by Sherdils.