Hey, Benjamin. It's a hard subject you've pointed out. It never happened to me still, I remember when I was on a conference from @archdaily creator David Basulto, he was telling his experience when a Chinese blog starts to replicate his content to the Chinese market, exactly what happened to you. Was quite interesting because he tried everything to pull his Chinese cloned website down with no luck at all, he even went to China to see if he could do anything. At the end he hired his Chinese copycat, proposing to he become part of the Arch Daily's team as a Chinese correspondent, which the Chinese guy accepted. I really don't now how much they've copied you and how they are operating, but have a similar strategy could help you :D all the best,

Pedro H.