China's new "economic tsar" He Lifeng is emerging as one of President Xi Jinping's most powerful lieutenants, but some sources say he is yet to gain the standing of his predecessor in financial markets and the diplomat community. He, 68, replaced internationally respected Liu He as one of China's four vice premiers during its annual parliament session in March. The full scope of his portfolio had been largely unclear until Sunday when state media referred to him as the director of a powerful Com