If you want to pursue, this is a good site to start:
https://www.thebeijinger.com/blog/20...gs-top-tailors
I used Lisa Tailors, and was pleased with the results. Not 24 hours, but IIRC I went in one afternoon and came back for a preliminary fitting the next day. I then didn't have enough time left in Beijing so they shipped the 2 suits for me. They came in the time-frame promised.
I'm please with the quality of the fabric and fit. They spoke reasonable English.