Re: similar looking aircraft
Everyone spies on everyone and it's overly simplistic to write china off as copycats.
It's not just weapons. They copy damned near anything and everything and then sell it to the world. Their law says only native Chinese can coyright and they will only enforce native Chinese copyright. Everyone else is ignored. Even now, there is fighting going on internally as the Chinese copyright/patent laws are not being enforced and companies are stealing from each other.