Wheto order 2020 x22 dongfang Rear Sprocket
 

Im trying to find out where is best to order a rear 17 tooth sprocket for my 2020 x22/crx dongfang. anything is helpful thank you

The front sprocket is a 17 tooth. You will want to install a 36 tooth on the rear. You can order a custom sprocket from PBI Sprockets as you will not find a 36 tooth already made. You can order from here. https://shop.pbisprockets.com/product.sc?productId=503

Here's the information you will need to enter.
428 sprocket, Center Hole Size. size: 64mm, 58mm if you remove the spacer ring - Size of bolt holes diameter. 10.5 circle diameter through center of all bolt holes: 96mm
Important Note: Sprocket will need to be milled to recess and install the stock steel spacer ring.
Here's a video on changing the sprocket.
https://www.youtube.com/watch?v=d_W4WPeLVec&t=313s

Rear Sprocket
 

Yes thank you so much Jerry I really appreciate all the information

If I remove the spacer ring it will be 58mm so I don't have to do any milling or reinstall the stock ring?! is that correct

That is correct.