Originally Posted by MSPeconomist

Be careful about trying to book with DL miles from China (or most of Asia) to the USA through Europe. This isn't a legal routing for DL (even during IROPs that are DL's fault) and will require two separate award tickets. If somehow they're not issued as two fare components on the same ticket/PNR, you could be denied boarding for not being admissible (I assume) for the EU/France. There could also be issues with checking luggage through: if this isn't done when you check in at PVG, you would need to enter France to claim and recheck the bags, which again gets to the same issues of whether you're admissible as well as needing to satisfy additional testing/quarantine/documentation requirements.