Prof. George van Driem (L), director of the Linguistics Institute of University of Bern, talks with Hao Shiyuan(C), assistant to the president of the Chinese Academy of Social Sciences and head of the delegation in Bern, Switerland, on May 25, 2015. A Chinese cultural delegation from the country's various Tibetology research centers on Monday held a forum discussion with their Swiss peers to deepen mutual understanding and exchanges in the Tibetan studies. (Xinhua/Xu Jinquan)