I need to renew my Chinese work permit in China (Tianjin) soon. When renewing the work permit, the office (Entry Exit Bureau) holds your passport for about a week, and give you a slip of paper which you give back to them to get the passport (see below). The slip has your photo, some personal details, and the date when to collect your passport.
I might encounter a problem where I need to travel (return Tianjin to Shanghai) during this period (when I have the slip, not the passport). I'm happy to take either a plane or train.
Question: Is domestic travel in China possible without a passport during the process of renewing a work permit?
A Reddit post writes: "When you hand in your passport you should be able to ask for a receipt/certificate. This document allows you to travel in China. At least that's how it works for visa renewal." (link) But I don't know how trustworthy it is.
Edit: I was able to organize the new work permit after travelling to Shanghai, but for future reference, here's a copy of the slip I was referring to: