I love that Tchaikovsky concerto. I have the CD, and I have listened to it many times over the years. I think someone has skated to it in the past, but I can't remember the name.
IMO another dream piece of music is Beethoven's 5th piano concerto. It is slow, so it can only be the middle portion of a long program, but it's beautiful. It will be perfect for Mao's lyrical style.