In the next few months, we are involving in organizing 2nd Annual Symposium of Drug Delivery System 2012 (SDDS-2012) in Nanjing, China during November 8-10, 2012. On behalf of the organizing committee, this invitation letter is to ask if you have interest in joining us and give an oral presentation, we sincerely hope you could come and share your experience to let others have a chance to gain a lot.SDDS-2012 will feature a new theme of “Smart Methods and Technologies for Drug Delivery” and will consist of 6 scientific tracks. “Outlook for Global Market Trend of Drug Delivery Systems”, “Current Innovative DDS for Treating Major Diseases”, “Breaking Research and Technologies of DDS”, “Nanotech for Drug Delivery”, “Novel Technologies for Biotherapeutic Drug Delivery”, and “Medical Devices for Effective Drug Delivery” are the main areas for the sessions that will be discussed in morning and afternoon sessions in each of 3 days. The symposium is a leading conference, held annually in China, with a boundless enthusiasm of the colleagues both from academia and industry to present latest development, exchanging ideas, discuss current research topics in key strategic areas and encourage potential collaborations in the field of drug delivery. The Organizing Commission hope and believe that, as the former 1st SDDS achieved, the 2nd SDDS will offer great opportunities for interaction and networking among the attendees, and bring the academia, industry and health authorities together for sharing their experiences, and will help all the participants from academia and industry to solve current problems and challenges in practice. There will be plenary lectures and session lectures given by the featured speakers from all around the world, and also oral presentations selected by the submitted abstracts. The "Poster Session" from different fields of pharmaceutical sciences will be set. Also the symposium is combining with the 10th Anniversary of International Drug Discovery Science and Technology and the 3rd Annual Congress of Nanomedicine within 600 dynamic sessions. We hope you enjoy the scientific atmosphere provide by SDDS-2012 and look forward to seeing you in Nanjing!