Third floor. According to the inquiry of Xi 'an local treasure, the seats of Xi 'an Library are mainly distributed in the newspaper area on the first floor, the lobby on the second floor, the social science book lending area I literature on the second floor, the social science book lending area J art on the second floor, the study room on the second floor, the reference book reading room on the third floor, the local literature reading room on the third floor, the natural science book lending area on the third floor, the novel area on the third floor, the lobby on the fourth floor and the lobby on the fifth floor.