There is only one airport in Hangzhou, the Xiaoshan International Airport. You don't have to leave the airport to change to another flight.

I have mistake in information. I arrive from Malaysia to Xiaoshan International Airport and I am being collected from Shanghai Pudong Airport.

How do I get to Shanghai Pudong Airport (PVG) from Xiaoshan airport (HGH) after 10:30 at night and how long will it take?

Thank you.

You are welcome.
If you are taking the Airasia Flight, you can take the shuttle bus supplied by Airasia for their passengers. After arriving at the final station (near Nanpu Bridge), you can take taxi to Pudong Airport.

The other option is that you can take taxi to the Hangzhou South Railway Station and take train to Shanghai, the fastest one is at 02:08 and arrive at 04:10 at Shanghai South Railway Station. You may need to take taxi to the Pudong Airport.

If you are not in a hurry, I suggest you take the airport shuttle bus to Hangzhou Railway Station and stay in hotel nearby. Then take train to Shanghai in the morning, the earliest one leaves at 07:40 to Shanghai South Raiway Station. After arriving, take the Airport Line 7, it costs CNY20 for 50 minutes.