What's the easiest way to get Shanghai Zhujiajiao from Fairmont Peace Hotel/The Bund?

Take metro line 10 from East Nanjing Road to Laoximen Station and metro line 8 to Lujiabang Station. Then transfer to metro line 9 to Dongjing Station, Exit 4. The whole way takes around an hour. And the ticket fare is CNY 6 per person. Take public bus no. Song Zhu Line to ZJJ Station.
Afterwards, walk northwest around 350 yards to find the scenic area.

What bus number?

There is no exact bus number. The name of the bus is Song Zhu Line. You can find the characters on the body of the bus.