Shanghai to Suzhou

Hi, I would like to go Suzhou from Pudong Airport around 2pm. May I know how long is the travelling time to take bus from Pudong Airport to Hongqiao Airport and transfer bullet rail to Suzhou? Do I need to buy bus ticket to Hongqiao and bullet ticket to Suzhou in advance?

Or should I take long distances bus from Pudong to Suzhou directly? Which is more convenient and faster? Where is the long distances bus stop at Suzhou?

Thanks