They don't know at all. Since BTF takeover the qualification process, no one thought AIBA events are important. China sent an almost amateur team to 2019 WCH which means it's impossible for a boxer attended both 2017 WCH and 2019 WCH. The worst part is not ranking system, the worst part is that every other sport is resuming qualifiers but BTF just cancel them easily, not postponement not relocation, just cancelation. It doesn't recognize the effort boxers made during past two years. It just want to fill in the entry form with some random names and it gets job done.