The naughty child was causing trouble in the carriage and almost killed the patient I was treating. I scolded him a few times, but received a beating from the bear's parents. Later, the naughty child fell from the upper bunk and hit his head. As the only medical staff on this train, I chose to watch indifferently. The bear parents knelt down and begged me to save their children. I am helpless. "I wanted to save him too, but you injured my hand."