On the afternoon of June 20，2013，Prof.Norio KAIFU（president of International Astronomical Union）from National Astronomical Observatory of Japan together with Prof.LiuChaiping（Purple Mountain Observatory）visited NIAOT。

　  Prof.Norio KAIFU accompanied byProf.ZhuYongtian（director of NIAOT）visited Mirror Lab、Research Lab of Large Astronomical Optics、Extraplanet Detecting Lab、Spectragraph Lab etc in NIAOT。

　  Prof.ZhuYongtian introduced the recent development of NIAOT。After then，two sides conducted related discussion。