Transit time from Terminal 1 to Terminal 2 in Chongqing

I arrive to CKG T1 on Monday at 16:40 and have my next flight to Kunming from CKG T2 at 18:05.

Is there any bus connection from T1 to T2? How long does it take? Is it ok to go walking from T1 to T2 and how long would it take?

Thanks and BR's!