JK Rowling

“In the movie [Crimes of Grindelwald] I included a Chinese creature. I’ve been immersed in a bestiary from China – mythical creatures and so on with their various properties. So, I can’t say too much now, but I’m using something from China in the next movie as well. So, at the moment my head is full of Chinese mythical creatures.

The Zouwu, which came out of genuine Chinese mythology. I was looking for something that was visually unlike anything we’d seen before in the world of Beasts and this particular creature leapt out at me from this very old Chinese bestiary that I was reading in, translation, and, I loved many of it’s characteristics.

What I didn’t want to do is a Chinese dragon because that’s your emblem and, beautiful though the idea of the Chinese dragon is, I think that… I don’t want to say too much because I know what’s going to happen in the next story, but I think that there are other interesting places that Chinese mythology can lead us. The dragon is perhaps the most obvious place to go and I didn’t want to do that, so we’ve got a feline creature that is both lovable and frightening, as many of Newt’s favourite beasts are because he’s attracted to these wild and sometimes quite challenging creatures.”

Source: YouTube