1. If you take a Maglev train (CNY40), please get off at Longyang Road and then transfer to the subway Line 2 (CNY4) to reach Nanjing East Road station. Exit from metro station, you could walk to the hotel on Shangxi South Road easily.

Or, you could take the shuttle bus Line 2 (CNY22) to reach the Jing'an Temple firstly and then transfer to subway Line 2 (CNY3)to Nanjing East Road.
2. yes, there will some celebrations. You could walk from the Nanjing Hotel to the Bund to watch the excellet night view. Or, walk to the Peopel's Square for the Countdown. Well, you'd better ask the hotel's staff for details.
3. you could take the subway Line 2 to Jing'an Temple to take the airport special line (CNY4)to reach Hongqiao Airport directly.