I am a Canadian citizen currently living and working in South Korea. I am going to be flying from Incheon International Airport (ICN) in Seoul, South Korea to Bangkok (BKK), but have a 4 hour and 20 minute layover at Shanghai Pu Dong (PVG). Do I need a transit visa for China? I am also flying back from Bangkok--BKK to Shanghai Pu Dong--PVG on my way back to Seoul--ICN. Do I need a transit visa for my return to South Korea? My friend is also traveling with me...however, she is an American citizen.

Any help would be appreciated.

Thanks