Hi Kai, thank you for still remembering me and the concern from youfor your concern.

When you have an "and" you are connecting two phrases. You should be able to remove either of the phrases and have the sentence still make sense. "Thank you for the concern from you," is grammatically correct, I guess, but the repition of "you" seems awkward. "Thank you for your concern" would be the more natural way to say it, and that's still true even if you're thanking him for multiple things.

Around the Chinese New Year, I don't think everything wasthings weren't going very well for me.

The first thing is that someone reported me for no reason and the discipline investigation department investigated me.

I stopped learning forstudying about a month.

"Studying" is more the intentional action, "learning" just sort of happens when we study.

I have just restarted learning sinceat the end of thislast month.

If you wrote this at the end of the month and you had just started studying... I'm not sure how I would say that. Maybe "It's the end of the month already, and I've just restarted learning" or something.

But the editor edited my article and I don't think they are doingdid it well.

Hi Kai, thank you for still remembering me, and the concern from youfor your concern.

Your sentence is perfectly clear, but this correction is a little more natural.

The first challenge I experienced, is that someone reported me for no reason and the discipline investigation department investigated me.

I also wrote an article to remember my mother, and my local newspaper published it.