For people who haven't heard about the controversy:
Noctua the premium computer fan maker added a new, Chinese factory to their supply chain.
Someone on Reddit discovered that there was a slight colour and shape difference between the Chinese fans and the ones made in China.
https://www.youtube.com/watch?v=pvCok2t3qRg
Acording to GamersNexus it does not matter and performance is the same.
Rejoice.