In the afternoon on April 6th, Li Xiaohui, a doctoral supervisorandresearcher from NTSC, Chinese Academy of Sciences, was invited to the seminar held by the Library of Shaanxi Province, giving an interesting public science presentation entitled "The Story of Time"for citizens of Xi'an.

The seminar attracted more than 200 audiences from various social circles in Xi'an. Li Xiaohui, the researcher, explained profound theories in simple language with clear logic and with lively, interesting and fascinating details.