We just returned from a trip to China with a 1-day stop in Xi'an to see the Terracotta army. We engaged Bryan Bai Chen as a guide based on Trip Advisor recommendations and he really delivered. Bryan has a degree in history, speaks excellent English and has lived in Xi'an his entire life so he is well qualified. He suggested a specific itinerary to meet our needs (since we had an early afternoon flight to Chengdu). We had a chance to see the Hanyang tomb (which we wouldn't have identified on our own but was well worth the visit). Bryan was extremely helpful - going out of his way to ensure we made our flight (even helping us through an unusual security check). We highly recommend his services!