I am coming from Changzhou to Hongqiao Railway Station and normally take a taxi to Pudong airport.

That exercise cost about 220 RMB , so this time around I decided to use subway . How long will it take in subway , Line 2 I guess , from Hongqiao Railway Station to Pudong Airport - approximately - give or take 5 seconds ( just joking ). I have flight at 8PM - so I need to be there around 5:30 ish to 6PM .....and may catch a bit of peak hour traffic .

Cheers