Adjust font size: SANTIAGO, Dec. 14 (Xinhua) -- The COVID-19 pandemic, economic recovery, and digital education are among the topics featured in a series of virtual conferences this week to commemorate 50 years of diplomatic ties between China and Chile. The conferences were jointly organized by China's Tsinghua University, Chile's Pontifical Catholic University (PUC), and the University of Chile. "I am very honored that Tsinghua University and its partners in Chile are co-hosts of this 'Chile-China Week'," Tsinghua University Vice President Yang Bin said at a ceremony kicking off the series. "Since 1970, Chile and China have enjoyed 50 years of diplomatic relations, which is nothing less than a brotherhood," said Yang.