Chen Yunlin (front, L), president of the mainland-based Association for Relations Across the Taiwan Straits (ARATS), exchanges agreements with Chiang Pin-kung (front, R), chairman of the Taiwan-based Straits Exchange Foundation(SEF), in Taipei, southeast China's Taiwan, Aug. 9, 2012. Chinese mainland and Taiwanese negotiators on Thursday signed two cross-Strait agreements on investment protection and promotion, as well as customs cooperation.(Xinhua/Hou Dongtao)