For transportation,
When you arrive at the Xiaoshan Airport, you can take the Airport Shuttle bus to Hangzhou.
From Hangzhou to Suzhou, you can take long distance bus or train.
From Suzhou to Shanghai, you can also take long distance bus or train, train is more convenient.
You need to return to Xiaoshan Airport from Shanghai, you can take train from Shanghai to Hangzhou Railway Station (not South Station), and then take the airport shuttle bus to Xiaoshan Airport.