Shanghai Astronomical Observatory (SHAO), is an astronomical observatory in Shanghai, China. It has a long history of astrometry, and also operates the Sheshan 25m radio telescope as part of the Chinese VLBI array and the EVN. It was formed in 1962 from the merger of the Xujiahui (originally spelt Ziikawei) and Sheshan (Zose) observatories in Shanghai. It is involved with the Chang'e 1 moon mission as the VLBI array is used for position determinations.
In October 2012 a 65-Meter Radio Telescope was completed for Shanghai Astronomical Observatory.