Thanks Biwash for the Feedback ! Yeah I already bought the ticket before reading the reviews so I have to live with it now. I am flying from SFO -> Shanghai -> Kunming -> Kathmandu. I confirmed with one of my friends mom who just came recently from Nepal via the same route and according to him Transit Visa was not required for his mom which I was mostly Scared of rather than the luggage. I checked the china embassy website for the Transit Visa and according to it if the layover is more than 24hr then its required and also if you want to leave the airport you need the visa. Since I will be flying with my wife I guess we need to deal with it and get company of each other and heard there is free wifi in the airport..:)