Guys, I am also back from Nepal and had used China Eastern. The only hassle I faced was the check out and check in luggage on every china airport ( meaning in Shanghai and in Kunming). Since I had 14 hrs transit in Kunming, I stayed in a Bangladeshi's guest house that night ( with some nepali friends met on the airport). The fare was just $20 for dinner, accommodation and breakfast the next morning including pick up and drop off from and to the airport. I will also not complain about the food that I got on the plane. On the aiport also wifi is not free but you can go to some café where wifi is free. Some of the cafe's even accept US dollars. So, overall it is not that bad. So don't be confused on the transit visa also.. If you stay more than 24 hrs then you need transit visa otherwise not.