I need to ask where can we take the airport night line? What is it? metro? bus?

what is the maximum passengers of taxi at shanghai? there are 5 of us:Which is better:
1. to take taxi cab to nanjing hotel shanghai from pudong airport
OR
2. take airport night line alight at middle zhejiang road and take taxi cab to hotel? ( We arrive at midnight)
Thank You Very Much to your reply.