Do I need transit visa in advance ?

My flights are :

Dubai to Kunming (flight no. MU-756), 2 hours layover,
Kunming to Shanghai (flight no. MU-756), 3 hours layover,
Shanghai to Hongkong (flight no. MU-509).

So the flight number from Dubai to Shanghai is same. So do I need transit G in advance ? or I can get it in Kunming ? I have Indian PP.

thank you