We (two women) would like to take the train from Lhasa to Xian and then see the Terra Cotta Warriors and hike up the Plank Walk to the top of Hua Shan, stay one night at the top and take the gondola down. We would then take the train to Beijing. We would greatly appreciate advice on particulars of timing, methods of transportation and timing for connections, how many days to allow in both Hua Shan and Xi'an. I am hoping that we are not required to be part of a tour.... Please advise.