There is a Test forum where you can experiment. You have to choose the third line from Photobucket menu and insert it into your post. This line is for HTML code.

Garden Web has a Test Forum you can use for things just like this, or practicing photo uploads, etc. It's here.

I have two of these in pots, which were started from cuttings of a bearing tree living (at the time) near Sterling, VA, zone 7a. They are each about 5 feet high now. Whether the original tree in Sterling was a seedling or a rooted cutting, I'm not sure. It seemed to not bloom until it was quite tall -- maybe 8 feet. Have you tried Keraji mandarin? Pretty darn hardy and might make it in zone 8. Better than Changsha.

So glad you can get this done NOW! It's been a struggle for you, we know. Will this be a test for antibodies or the swab?