Bsidees these multilateral cooperation bodies, several important bilateral links are also at work. For example, ASEAN and China signed a Joint Declaration on Non-Traditional Security Issues in 2002 and a Plan of Action to Implement the Joint Declaration on ASEAN-China Strategic Partnership for Peace and Prosperity [2011-15] in 2010. Their bilateral ties also include the Greater Mekong Subregion [GMS] Enviromental Cooperation mechanism and the China-ASEAN Environmental Cooperation Centre [CACE] in Beijing, which was opened in May 2011 as the main agency for technical support and implementation of relevant projects. Other bilateral links include, for instance, the China-Thailand Friendship workshop to promote clean rural development.