There have been more than a few mass stabbings in China where lots of kids, from people who aren’t particularly trained in knifing people. There was the Wuxi vocational school stabbing in 2024 where 8 people were killed, there is a long list of school attacks, most of them are stabbings: https://en.wikipedia.org/wiki/List_of_school_attacks_in_Chin...

There was also the Kunming train station mass stabbing a decade or so ago, killing 31 people. https://en.wikipedia.org/wiki/2014_Kunming_attack

Note that China does have a pretty low homicide rate, probably since guns are so hard to get ahold of (death penalty for even producing guns in backyard workshops).