we took this exact trip last year and had the best time. The free excursion to Beijing was unbelievable, esp considering we did not pay extra for it. I cannot encourage you enuf to take the optional excursion to Xi'an. We bought a Terra Cotta Warrior to take home (we had it shipped as it weighs like 150lbs. It is in my garden and reminds me every day how very special that trip was. You will love it.
