Chairman of the mainland's Association for Relations Across the Taiwan Straits (ARATS) Chen Yunlin (L) exchanges documents with Taiwan's Straits Exchange Foundation (SEF) Chairman P.K. Chiang after a cross-Straits signing ceremony in Taipei December 21, 2010. Taiwan will increase the daily limit on the number of mainland tourists allowed on the island to 4,000 from next year. Chen and Chiang have also signed a medical and health care cooperation agreement during talks. [Photo/Agencies]