in the us it's clearly self defense because the person was overwhelmingly charged and beaten, whose life was threatened.
when one is attacked by a dog and injured, he/she is entitled to killing the dog. similarly, when it happens and a cop is called to the scene, the cop would pull out his gun and kill the dog at the scene.
when one is attacked by a dog and injured, he/she is entitled to killing the dog. similarly, when it happens and a cop is called to the scene, the cop would pull out his gun and kill the dog at the scene.
it might be different in china though.