Yunnan Astronomical Observatory founded in 1938 is a ground-based observatory for practical astrophysics in southern China. The main research areas include active galactic nuclei, stellar evolution, variable and binary systems, physics of solar active regions, astrometry, and the applications of new technologies and methods in astronomy. The Chinese Academy of Sciences has designated the Observatory as a Key Laboratory for the Structure and Evolution of Celestial Objects. There are several ground-based optical and radio telescopes in YNAO, such as 60-cm, 1-m, 1.2-m and 2.4-m optical telescopes, 10-m and 40-m radio telescopes. In addition, a new 1-m solar spectropolarimetry infrared telescope and 1.8-m adaptive optical telescope have been put into operation.

Lijiang Teacher’s College locates in Lijiang city, as historic city with three crowns: the World Cultural Heritage, the World Natural Heritage and the Memory of the World. The campus of LTC covers 410 thousand square meters including an area of 173 thousand square meters for school buildings. It will suffice for ISYA-2011 given that there are plenty of teaching and research facilities in Lijiang Teacher’s College including over 273 thousand reserved books in library, improved campus network, several modern laboratories, lots of instructional computers and multimedia classrooms.