About a decade ago I was traveling home from China through Hong Kong airport. I had a handful of throwing knives, axes, folders, and nunchucks (maybe 2 handfuls) in my big bag I was going to check in. Already having gone through customs going over a border from Fu Zhou to Shenzhen, with no issues, I thought I was going to be fine. Two of the security opened my bag, and a couple of minutes later there were about 10 of them. Everything was fine, except for 2 of the folders that were spring assisted that were illegal in Hong Kong. They said I could do 6months in jail for each one, so a year. After calling the DOJ, they wrote out a report for the confiscation of the 2 spring assisted folders and let me check the bag with all the other goodies. I’ve been more aware of the laws of places I visit since!