I will arrive at Pudong airport at 7:30pm. I need to go to Hangzhou. Is there any bus after 9pm?

There is no bus running from the airport to Hangzhou after 9pm. Well, there is still a high speed train running to Hangzhou from Hongqiao Railway Station at 09:52. You'd better catch up your time to finish the procedure after arrival at the airport. Then take shuttle bus line 1 to Hongqiao Airport. Then walk about several minutes to Hongqiao Railway Station to catch the train. Or you'd better stay in the city overnight and then go to Hangzhou the next morning.