The ISRM national Groups for China and Singapore warmly invite you to Beijing for the 12th ISRM International Congress on Rock Mechanics in 2011. The theme for the ISRM 2011 Congress is "Harmonising Rock Mechanics and the Environment" to emphasize the critical roles of rock mechanics and rock engineering in sustainable development and environment preservation. In addition to the 4-day technical program, workshops, short courses, technical visits, exhibitions and social programs will be organised. Meetings and functions of ISRM Board, Council, Interest Groups and Commissions, and other ISRM related activities will also take place in conjunction with the Congress. We look forward to welcoming you to the ISRM 2011 Congress. With the fastest growing economy and the largest population in the world, China's economic and social growths require the development of resources and infrastructures. Rock mechanics research and rock engineering practice present unique opportunities as well as challenges to science and technology. The ISRM 2011 Congress in Beijing offers an excellent opportunity for the international rock mechanics and rock engineering community to exchange, to share, and to progress. The ISRM national Groups for China and Singapore pledge to do our utmost to make the ISRM 2011 Congress the most exciting congress. With the combined efforts and experiences of China and Singapore, and supports of other Asian countries, we can assure you that this will be the congress to long for and to be remembered for years.