“On the left side of the makeshift wobbly stage, Lang Lang, China’s fresh-faced piano prodigy, stroked the keys meticulously as Chucho Valdés, one of Cuba’s music superstars, struck heavier tones on a second piano positioned to the right. At center stage, standing before the Cuban National Symphony Orchestra with her baton raised high, Marin Alsop, the American conductor, unified the ensemble.”