Greetings! We are honored to invite you to participate in the Technical Program Committee of the 7th International Symposium on Ultrafast Phenomena and Terahertz Waves (ISUPTW 2014). ISUPTW 2014 will be held on Oct. 13-14 in Shanghai, China. There is another important event that will be held at the same time, we will hold a special Memorial Symposium in honor of Prof. H.C. Liu. ISUPTW, an international conference, is devoted to strengthening the understanding and cooperation among worldwide scientific researchers and promoting developments in ultrafast and THz science and technology. The biannual symposium, initiated in 2002, has been held in Beijing, Shanghai, Nanjing, Tianjin, Xian, and Wuhan.