How can I get to Hyatt On The Bund Shanghai from Hyatt Regency Chongming?

You need to take Bus Chongming Dongtan Line 2 and transfer to Bus Shenchong Line 2 at Chengjiazheng.
After that, transfer to Subway line 6 at Wuzhou Avenue and change to line 12 at Jufeng Rd.
Get off at International Cruise Terminal. Leave from Exit 3 and walk west for 10 minutes. Turn south and walk for 5 more minutes, you will get to the hotel.