Hi, I am travelling to Hk and the flight goes via Shanghai, stopover appox 3 hours.

My return is via Chengdu a week or so later.This stopover will be approx 14 hours. I would prefer to get a nights sleep in a local hotel.If I leave the airport do I need a temporary visa or can I get away with a 72 hour free transit type? If only temporary visa how much will it cost ?

Thank u

Gregg