Title: Current Status and Prospects of Astronomical Optical TelescopesSpeaker: Xiangqun CuiInviter: Xi Kang‌‌Time: 15:30pm, December 18（Thursday）Location: Room 215, No. 8 Hainayuan Building, Zijingang   Abstract：The scientific frontier of astrophysics has always driven the continuous development of observational technologies and equipment, while new achievements in observational techniques have also provided astronomy with new horizons and discoveries. Over the past few decades, from the late 20th century to the present, advancements in fields su...