There are even online videos that instruct how to make your own crossbow out of pens, because they're apparently so popular that stores are frequently sold out. Some schools (and even cities) have started to ban these mini-weapons before too many people lose an eye. Distraught parents have taken to social media to express their concerns.
"Hurry up (and ban them), pupils do not understand and are just shooting people for fun. It will cause accidents sooner or later," one parent reportedly wrote on Weibo, China's version of Twitter.