I went on the China Cultural Capitals trip in Fe., 2011, so recently. It was wonderful. We had Albert as our PD. I hope you get him. He is the best!!
Anyway, about converters/adapters. I have to charge my camera battery and potentially my Kindle, so I always take a converter and adapters. Needed it for my curling iron also. I do know that I had to use the converter, but I am thinking that all of the outlets had multiple types of sockets, so I can't remember if I needed my adapters or not. But they take up so little room in your luggage, that you should just take them, just in case!!!
Be sure to take luggage locks whether you use them on your luggage when traveling or not. (I always lock my checked luggage with TSA-approved locks anyway). We were required to have them on our checked luggage on the flights WITHIN China. Albert had some extras, for people who did not know that.