Chinese Vice-Premier Liu Yandong listens to the introduction of a research project by a Tsinghua University exchange student studying at the University of Pittsburgh School of Medicine on Friday afternoon. Liu is visiting the US for the 6th China-US High-Level Consultation on People-to-People Exchange, which will officially kick off in Washington on June 23 by Liu and US Secretary of State John Kerry. [Photo by Chen Weihua / China Daily]