I am arriving from London via an Air China flight in Pudong at 6:45 a.m. and have an Air China flight to Shenzhen that departs from Hongqiao at 11:30 a.m. I understand that there's a shuttle service between these airports that leaves every half an hour.
Is this information up to date and is it still the best way to do this transfer? And additionally, will I then be entering China in Shanghai itself or am I still airside? Lastly, is there anything to keep in mind?