I want to book Chaina Eastern Return Air Ticket LAX to CCU

Hi

I want to book Chaina Eastern Return Air Ticket LAX to CCU 2 stop, its asking for Transit G,
Then I visit your website : 24-Hour Direct Transit
There I can see if I leave chaina within 24 hrs then transit G not required. I am arriving 6 am Shanghai-Pu Dong and leaving Kuming at 11.35 pm. Please guide me if I need transit visa or not .

Best Regards
Suman saha