While the punishment may seem harsh, there is no doubt that the pilot's of Juneyao were fundamentally wrong in disobeying an ATC instruction. Unless the safety of their own flight was in jeopardy by following such an instruction they had no choice but to go-around and make room for QATAR. Did the Juneyao crew factor the possibility that on landing, they might blow a tire (whatever) and block the runway thereby complicating the emergency even further? Probably not. What is the appropriate punishment? Who knows. I will say this however, the Captain and First Officer will probably never make the same mistake again.