Jeju connecting flight via (PVG) Shanghai Pudong Internation

Hello Guys,

Can anyone provide me info on this ?

I am an Indian Passport Holder having Hong kong valid working visa. I am travelling to Jeju (south Korea) from Hong kong. I am using china Eastern Airlines. I am having stop over of 6 hours at Sanghai international airport (PVG). Do i need to have Chinese transit visa ?? Because what i have heard connecting international flight don't required transit permit. Its like this HK - PVG - JEJU , Return jorney JEJU - PVG - HK.

Thanks,
SJ