Shanghai subway Line No. 2: airport-to-airport

As of a few months ago, Shanghai has what may be the world's longest subway line, connecting the Pudong Airport (some 40 km east of the city) with the Hongqiao Airport (on the far western edge of the city, some 12+ km west of downtown). According to this trip report, one can actually make it from the arrivals gate at Pudong Airport to the check-in area in Hongqiao's new Terminal Two in 1 hour 40 minutes. (The actual subway train travel time is
said to be about 90 minutes.)
Presumably one can get from Pudong to the new Hongqiao Train Station within pretty much the same time.

The subway fare is said to be just 8 yuan (a bit over US$1), which is a remarkably good deal for this kind of distance.

This all is great of course, but the Hongqiao connection also contrasts the relative speeds of the city subway and the new intercity train: if you have entered China via the Pudong Airport (which is one of the country's top international airports) and want to go to Nanjing, it would take you 1.5 hours to make 60 km to Hongqiao, and then just 1 hr 15 min if you take the fastest train from Hongqiao to Nanjing (300 km away).

Of course, the Pudong airport is also served by the world's fastest train - the famous Shanghai Maglev, which would allow one to cut the actual time on the train by about half an hour, at the cost of 50 yuan. But taking into account the extra transfer(s) involved, the overall time saving may be pretty minimal.