Or a second blast from the cannon at point-blank range.
Author : Although Tai Lung's narration hyped up Master Rhino and said he was one of the strongest at least, he was not that powerful in the world. He was killed by the cannon of Shen when Po and even Tigress could survive it so he was definitely not the strongest living master.
I doubt it. Maybe he was seriously injured and Shen gave the finishing blow.
Author : Although Tai Lung's narration hyped up Master Rhino and said he was one of the strongest at least, he was not that powerful in the world. He was killed by the cannon of Shen when Po and even Tigress could survive it so he was definitely not the strongest living master.