Transit VISA / PERMIT

I am INDIAN Passport holder, I traveling to and form Japan by CHINA ESTARN AIRLINES, I change flight KUNMING and SHANGHAI (PVG) AIRPORT for JAPAN . I don't leave the AIRPORT, ONLY WAITING SOME ( 2 to 6 hours ) HOURS FOR the next Flight! do I need the TRANSIT PERMIT? OR I get the Free stay PERMIT IN THE KUNMING and SHANGHAI AIRPORT ?? PLEASE HELP ME ,
THANK YOU
Ganesh