COIMBRA, July 5, 2016 (Xinhua) -- Rector of Coimbra University Joao Gabriel Silva (2nd L) and Chinese Ambassador to Portugal Cai Run (2nd R) unveil the plaque of the Confucius Institute of Coimbra University during a ceremony in Coimbra, Portugal, on July 4, 2016. The Confucius Institute of Coimbra University, the fourth of its kind in Portugal among with those in Minho University, Lisbon University, and Aveiro University, is operating in collaboration with Beijing International Studies University (BISU) and Zhejiang Chinese Medical University (ZCMU). (Xinhua/Zhang Liyun)