After Beijing I have in total 7 days before I leave China. Xian and Chengdu are the other two destinations I have selected. Xian for the terracotta and Chengdu for the Pandas. Question - how many days should I spend in each of the place? I guess 2 days will be taken from 7 for travelling - one day from Beijing to Xian and one day from Xian to Chengdu.