What is the best way to go from Shanghai Hongqiao airport to Changshu ?

There are two methods for your choose:
1. From Hongqiao Airport, you could walk to the connected Shanghai Hongqiao Railway Station and then take a high-speed train to get to Suzhou Railway Station in 30 minutes. Upon arrival, you could take a city-bus to Suzhou North Bus Station and then transfer to Changshu by express bus in one hour.
2. From Hongqiao Airport, you could take subway Line 2 to People's Square and then transfer to Line 1 to Shanghai South Railway Station. Upon arrival, follow the directions walking to Shanghai South Bus Station and then take a coach to Changshu in 1.5 hours.