Philippine holder passport

H :)! My daughter and I are Philippine passport holder. We hold permanent resident status here in Canada. I booked a ticket which have connecting flight from Toronto Pearson international, Ontario to Shainghai Pu Dong, China. Lay over 4h 3m. From China to Philippines. Also, in going back to Canada I will have a lay over of 3h 10m in Shanghai Pu Dong, China. Do I need a transit visa in this flights?