I will be staying at 1558 Zhongxing, Shanghai. Could you tell me if that is West or South the City?

The hotel is located in Puxi Area. From your hotel, you can walk southeast around 500 yards to get to Main Railway Station Metro Station first. Then take subway line 4 to Century Avenue Station and transfer to line 2 to Longyang Road Station directly. The duration is about half an hour. And the ticket fare is CNY 4 per person. After that, you can take the Maglev Train to get to the terminal building of PVG. :)