It is our great pleasure to inform you that the International Conference on Ultra-Short Electron & Photon Beams: Techniques and Applications will be hold during September 7-11 in Shaanxi-Xi’an, China. The Conference will bring broad communities to review the latest developments and challenges in ultra-short electron and photon beams, and look into their bright future. “超快电子束与激光束产生及应用国际研讨会”将于2009年9月7－11日在西安国际会议中心举行。