If you have only…

One day in Xi’an
In the morning visit attractions from Day 2 (4-5 hours). In the evening visit Great Mosque of Xi’an (less than 1 hour) and get lost in the maze of Muslim Quarter (2-3 hours).

Two days in Xi’an
On the first day visit attractions as described above in One day in Xi’an. On second day visit Shaanxi History MuseumBell Tower and Drum Tower, and Xi’an City Wall.

Two and a half days in Xi’an
Do Day 1, Day 2. In a half a day visit Xi’an City Wall.