I will be staying at Shanghai Junpeng hotel which is the nearest sight seeing bus stop?

Do you refer to the hotel in Pudong Airport Branch?
If yes, the nearest and the most convenient bus stop is People's Square Subway Station. The exact boarding site is No.100, People's Avenue. From the airport, you can take subway line 2 from the airport to People's Square Station, Exit 2. After arriving, walk southeast around 180 yards to find the destination.