What are options for flying in to another airport and arriving at Nanjing by rail.

From what I gather:
From SHA, you can walk (or ride the subway a stop) and get on a a high speed train.
From PVG, it requires a long subway ride (or a Maglev + moderate subway ride - or a bus)
From PEK? There is a high speed rail from Beijing to Nanjing, but is it easy to connect from the airport?

Are there other airports that are easy to fly in to and "train" to Nanjing?