Sure you do Charlie, a couple years ago these names came up on a post, that’s where I learned about them.
http://www.hygeiafarm.com/
https://www.sunyuki.com/
http://www.yidiantian.com/?domain=yidiantian.com
http://igarden.cn/
I believe that the U.S. Consulate buys from one of these, don’t recall which…I think the farm in N. Chengdu is the one.
There are others, and a few that participate with Wwoof as well.
One in Mianyang is supposedly going the permaculture/organic route.
A few in Yunnan, and I know of a few others throughout the country, and a couple that are getting into permaculture.
Certification is the concern. From what I know, some years ago the first “organic” farm was closed down some time ago for being fake.
I assume that this could still be a concern. Who knows!?!?!?