https://michaelsavage.com/china-schoolchildren-killed-in-attack-on-first-day-of-school/
the story is always the same - the 40 yr old is a slave of government and the government is coming down on the individual for no reason but to terrorize him and take whatever he has - which is probably nothing, for his forced labors. he may have been poisoned by people he worked with (so a friend of a perp could steal his job)
wanting people in china to know and not forget his live as a slave was not to be forgotten and would be exacted IN BLOOD ...
the target he chose was: school children
a certain message those who tormented him were going to hell* and the nation would know it
in his mind, anyhow