The 12th Annual Meeting of the Beijing Electron Positron Collider was held in Qingdao from 6 to 8 August, 2007. Present at the meeting were more than 100 representatives from the Institute of High Energy Physics (IHEP), Hefei National Synchrotron Radiation Laboratory (NSRL), Lanzhou Institute of Modern Physics, and Shanghai Institute of Applied Physics.

　　Chen Hesheng, the IHEP Director, opened the meeting by extending his sincere congratulations on the success of the first phase beam tuning of BEPCII and thanks to all the workers involved. Representatives from accelerator physics system, RF system, microwave system, power source system, vacuum system, mechanical system, beam measurement system, control system, magnet system, radiation protection system and temperature control system delivered talks at the meeting. Important issues like accelerator physics and beam performance were discussed. The efficient exchanges at the meeting serves a sound basis for future BEPCII commissioning and operation. Issues concerning the design of the China Spallation Neutron Source were also discussed.