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Good afternoon all,
I know its common place to get these posts,but I really need some help!
I have a Chinese Elm that was a gift from my partner last July, the garden centre where she got it from informed us that it would need repotting this year.
About a month ago the soil was struggling to soak up water (just running off)so I decided it was time to repot.
I went back to the place we got it from and purchased some soil that the owner told me was correct for my elm.
I repotted it about 3 weeks ago (never done anything like that before,but watched a ton of YouTube videos, trimmed around 25% off the longest 2 roots and when repotted,watered thoroughly). I then kept it in a quite bright room (very temperature stable),but put it in a position that it wouldn't get any direct sunlight. A week ago,after deciding that it wasn't looking too healthy (leaves browning) and as the weather was so nice I decided to move it outside. I kept it outside for 7 days.
Now my tree really looks dead!
Yesterday I scraped a little bark away half way up the trunk and it is bright green underneath so hoping that it isn't dead/dieing.
4 days ago the soil was quite dry and after more YouTube videos (titled such as "help my Chinese elm is dying) I decided to water with the submission method, filled a tray up to just under the brim of the pot and left for 10 minutes before removing and allowing it to drain.
Please can someone spare some advice on how to try and save my Chinese elm?
I have attached 3 photos, one out of the old pot showing the roots,one straight after repotting (3 weeks ago) and 1 from arou nd 10mins ago.
Thank you in advance, Matt

I am afraid this little elm is already dead, even being a tough species.

Even when the trunk is so green internally?
Is there nothing I can try?

Can you tell me what I did wrong?

Don't want to do this again!

Thanks Matt

Try to put it outside, in the shade, don't fertilise it and water when the new soil fells dry.
Reppoting is always stressful for the trees.

Thank you,I will try that