William Peduto, mayor of Pittsburgh, Pennsylvania, shakes hands with visiting Chinese Vice-Premier Liu Yandong on Friday morning when Liu arrives at the Pittsburgh city hall for a visit. Liu is in the US for the 6th China-US High-Level Consultation on People-to-People Exchange, which will officially kick off by Liu and US Secretary of State John Kerry in Washington on June 23. [Photo by Chen Weihua / China Daily]