I went to college in Xi 'an for four years, just in the southern suburbs! There are many places to live. The ones with better conditions go south from Chang 'an University, including Aerospace Building (160/ day), Yuhuan Hotel (140/ day), Nanmenhou Prince Hotel (220/ day) and so on. There are many general conditions. There are several guest houses near the Institute of Posts and Telecommunications, which are very clean, but most of them are. 15 yuan 2-hour private bathroom, ordinary bathroom 3 yuan), further south, there are many similar guest houses on the road outside the courtyard, but they are not stable (boys and girls outside the courtyard are more open).
As for the place to play, two people upstairs in the city have made it very clear. There are also tourist attractions nearby. You can visit the Mausoleum of the First Qin Emperor, Terracotta Warriors and Horses, Huaqing Pool, etc. Take the special tourist line at the railway station for one day. It takes one day for Ganling and Famen Temple, and one day for Huashan. If you want to see Hukou Waterfall, you may wish to go to Qiaojia Courtyard in Shanxi with the group and arrange Hukou Waterfall for your return trip.