International Workshops on Accelerator Alignment (IWAA) are held every two years at particle accelerator laboratories around world. These workshops are devoted to the large scale metrology and high precision positioning of particle accelerators, focusing on the exchange of information between geodesists, surveyors and other specialists, reviewing and investigating all suitable advanced techniques. Participants are mainly coming from laboratories, institutes, universities or companies relating to particle physics, synchrotron light, medical or industrial applications of accelerator. The fields of geodesy, geomatics, metrology and traditional surveying overlap in this unique gathering. This will be the first gathering in China, welcome to Beijing.