The 17th International Conference on “Internal Friction and Mechanical Spectroscopy” (ICIFMS-17) will be held in Hefei, Anhui，China, September 21-26, 2014. As you are an expert in this field, you are cordially invited to take part in this conference. The topics of this conference include all the following but are not limited to: Development of fundamental internal friction theory and mechanism; Internal friction of solid materials; Internal friction of soft matters and granular materials; Design of novel high damping materials as well as their applications; Development, design and potential application of novel internal friction technique. In the ICIFMS-17 in Hefei we have planned a two-day tour to Yellow Mountain and Xidi & Hong historic villages for you to enjoy and learn more about China, well known for her own cultural diversity.