I chose Professor Ai Yu's three-hour guided tour, which was very thoughtful. She guided us away from the crowds, allowing us to quietly view the artifacts and listen to history without the jostling.
The content was also very interesting. She explained that the fading of the terracotta warriors was primarily due to the cracking and peeling of the surface lacquer layer, not simple oxidation. Her knowledge was very accurate. She even pointed out the craftsman's fingerprints on the hands of the terracotta figures, which was amazing. I definitely wouldn't have noticed such details without the guided tour. The tour included a lot of historical background and stories, as well as detailed features of various terracotta figures.
I highly recommend Professor Ai Yu! She patiently answers questions, and the tour was a great balance of work and rest. Thumbs up!