Bump. There seems to be conflicting information about whether you are forced to go to immigration, pick up your bags, and re-check in. In this thread 2 years ago, some say yes, some say no. The PVG airport website indicates that only LH LX NZ VS can avoid this mess. For other airlines it sounds hit and miss based on passengers' experience. I read a similar issue in a CX thread where passengers are connecting AA to CX in T2.

I have a flight arriving in PVG on TG and departing PVG on AC and I think there is a good chance that TG won't tag my bag all the way through because of PVG's passenger-unfriendly international transit procedure.