Beijing - Everything was perfect.
Xi'an - Everything was fine, maybe it would be better with more history details at the museum.
Guilin - The day we arrived Guilin would be nice to receive a lunch.
More history and geographic details about the places we visited.
Our guide is very nice and help us a lot with the changes we made, she resolves everything for us.
Shanghai - Everythin was excellent, our guide was great!