OP is asking about transportation to PVG in morning. Just ask concierge to book via didi if you don't have app. Booking via didi easiest, cheapest way save for public transportation. Just hard to use if you don't read Chinese.
I would not stay at Hongta. Should've been deflagged 5 years ago or even earlier. It was a subpar St. Regis even when it opened. Nothing Nearby in walking distance. Rooms falling apart and service awful. They often have room at 500-600 RMB (near price levels of a 4 points nearby) if that signals anything...
Try the W or the Renaissance Yu Yuan or St Regis