There is no direct bus could be used at the airport. So, please take the shuttle bus to Hangzhou Railway Station firstly. Here, you could take a train to Nanjing. If you miss the train, please take the city bus K188 or K95 from the railway station to the North Bus Station for the long-distance bus.

I would prefer to take a bus from Hangzhou to Nanjing since the train ride is much longer than that of a bus. I arrived at Hangzhou Airport at 13.10, pls advise if there is a bus service from the airport to the North Bus Station where I can catch a long distance bus for Najing

How how I catch a bus in Hangzhou city for the airport after I have arrived at Hangzhou from Nanjing by long-distance bus ?

No bus is served from the airport to the North Bus Station. So, you have to transfer in downtown, or take a cab at the airport to arrive there directly.

You could take a bus or cab to Wulinmen or Hangzhou Railway Station to catch the shuttle bus.