About Transit visa to go out of the airport

Hi Team,

I'm writing this email in regard to my travel from Canada(Toronto) to India (Delhi) on 4th Dec 2017 and we have Layover in "Shanghai(PVG)" airport for 19 hours.
My question here is do we need a Transit visa to go out of the airport in my layover duration?
If yes, then in which category I have to apply for the same?
Also, there are two important details which I would like to share with you :
1. I have an Indian passport
2. We (me and my husband) are a permanent resident of Canada.
3.
Below are my flight details

Airline Flt No. Dep. Dest. Dep Date Dep Time Arr Date Arr Time Class Aircraft Duration
China Eastern Airlines 0208 Toronto(YYZ) Shanghai(PVG) 04Dec 15:25 05Dec 19:10 Economy 773 14.45mn
China Eastern Airlines 0563 Shanghai(PVG) Delhi(DEL) 06Dec 14:25 06Dec 19:15 Economy 333 07.20mn
China Eastern Airlines 0564 Delhi(DEL) Shanghai(PVG) 19Dec 20:40 20Dec 05:00 Economy 333 05.50mn
China Eastern Airlines 0207 Shanghai(PVG) Toronto(YYZ) 20Dec 12:10 20Dec 13:25 Economy 773 14.15mn


I would really appreciate if you can help me with the above details so that I plan accordingly.