The children of Chengping were still filtering into the local elementary school on Friday morning, China time, when a deranged thirty-six-year-old man named Min Yingjun entered the campus. He carried a knife. (China bans private gun ownership.) By the time the security guards got to him, he had wounded twenty-two children and one adult. All survived. China, like most places, had seen this kind of madness before: one especially heavy string of school attacks in 2010 killed nearly twenty people and wounded more than fifty. The killers are as hard to recall in their particulars as they deserve.
