do i need a china visa? hi. i am a korean. also have korea passport.

my flight schedule have
korea => shanghai(SHA, stay 2 days) => shanghai(PVG) => paris(france, stay 4days) => KOREA.

i will arrive shanghai(SHA) on 3 OCT, flight out in shanghai(PVG) on 5 OCT
Shanghai total stay time is 48 hours.

i know free transit if transfer shanghai during 72 hours

IF arrival and departure airport is different. do i need a China visa?

thanks.