Hi, there is no direct train service from Hangzhou Airport to Shanghai. You can take the airport shuttle bus to Xiaoshan Railway Station or Hangzhou Railway Station to take bullet train to Shanghai. Since Xiaoshan Railway station is near to the airport, you can also take a taxi there. You can check China Train Schedule(https://www.travelchinaguide.com/china-trains/) to choose a railway station and train number according to your time.