Long layover at PVG
So I ended booking a flight to Jeju City and the only option that Delta could book me on that met my travel dates was on China Eastern transiting at PVG. I was a bit surprised that Korean Airlines was not available--the mysteries of the booking algorithms I guess.
The layover on the outbound flight (LAX-PVG) is not too bad (about 4 hours). On the way back I have a longer layover at PVG (arrive 2:25 PM and depart 9:00 PM). The amenities appear to be pretty sparse at the airport. Any recommendations on how I should spend my time? It appears that I can access (Elite Plus & Reserve CC) the partner lounge located in Terminal 1. Is there a restaurant at the airport that is preferable? I've never been through PVG, so any feedback or tips is appreciated.
Incidentally, I was booked in the R fare code for LAX-PVG and M fare code for PVG-LAX. The R fare code is a little worrying because it looks like it only counts as 50% MQMs.