Dear Colleagues, The 2010 Linear Collider Workshop (LCWS10) and the International Linear Collider meeting (ILC2010) will be held in Beijing from March 26 to 30, 2010. They will be hosted by a consortium of Chinese Institutes: Institute of High Energy Physics, Tsinghua University, Beijing University, Institute of Theoretical Physics, University of Sciences and Technologies of China. This is the twelfth in a series of workshops that have become the international fora for developing the physics case and reviewing detector and accelerator designs for an electron-positron linear collider. The workshop web page is found at http://lcws10.ihep.ac.cn/ Please register as early as possible since the number of rooms at the venue is limited. If you would like to give a talk at any of the parallel sessions at the workshop, please contact the working group conveners listed at http://lcws10.ihep.ac.cn/working groups.htm (or you can follow the link from the HP above) Best regards Local organizing committee Chair: Weiguo Li Co-chair: Jie Gao