I departed from Shanghai in early January and transited to Altay via Urumqi. Will I be quarantined or something?

Nucleic acid testing must be done, and the nucleic acid testing is within three days. No matter where you go out now, you need nucleic acid testing. If you are in a medium-to-high-risk area, try not to go.

No, according to the current epidemic prevention rules, your departure place, transit place, and destination do not belong to the medium and high risk areas, as long as you provide the green health code.