The 4th ASCHT will be held in Hong Kong SAR, China, during June 3 - 6, 2013. ASCHT’13 is built on the success of three previous meetings held in Xi'an, China (2007), Jeju, Korea (2009) and Kyoto, Japan (2011). The major objective of ASCHT’13 is to provide a common forum for presentation, exchange of new ideas and creation of knowledge in recent advances on various aspects of theories, analyses, and applications of computational methods amongst the scientists and engineers from Asia as well as other parts of the globe, who work on algorithms and applications in theoretical and engineering fluid and thermal science. It is our honor of inviting you to submit papers and to participate in this great event in this dazzling city, Hong Kong. The detailed logistics of the ASCHT13 is provided in the attached call-for-papers. Pease relay this email to your colleagues who may be also interested in coming to Hong Kong during ASCHT13.