Greek artist Alkistis Protopsalti sings a Chinese song at the opening of the Summer Nostos (Homecoming) Festival at the Stavros Niarchos Foundation Cultural Center in Athens, Greece, June 23, 2019. Greek artist Alkistis Protopsalti, one of the most acclaimed and popular singers in the past four decades in Greece, sang a Chinese song during her performance in a festival in Athens on Sunday evening, enthralling the audience. (Xinhua/Lefteris Partsalis)