Well doing independent research can sometimes yield the best results and hello there~!
Well lets see now, China, there is a lot one could draw from there; like Mandarin Ducks, Ao {That sounds like some kind of dragon turtle or immense turtle} is a thought, plus technically there is Landorus and the other 3 that seem based on the 5 creatures but Nintendo has only done 4 out of the 5, officially, which would leave you with The 5th, which in the mythology is a golden earth dragon, so in the context of this, could be a Dragon/Flying, Rock/Flying or Dark/Flying, with a Therian Forme that more resembles a dragon that looks more comfortable on the ground than it does the sky.
Beyond all that, I reckon you'd be best conducting your own search to find things that pop out~ I know China relies heavily upon certain fabrics for international trade, so that alone tells me certain Grass Types would be prevalent.