&$ &$Chinese pianist Lang Lang performs Chopin’s “Polonaise in A Flat major, Opus 53″ at an Apple store in New York, the United States, March 19, 2010. Lang Lang performed here on Friday to raise money for Haitian children suffering from the devastating earthquake. (Xinhua/Wu Kaixiang)&$ &$ Accomplished Chinese young pianist Lang Lang and his collaborators held a fundraising concert on Sunday …