But he remains most closely associated with the cosmopolitan city of Shanghai, where he was mayor before being plucked away to become overall head of the Communist Party. In Shanghai, he championed foreign investment and built up a network of proteges and associates he later helped promote up the ranks of party leadership — a power base analysts of Chinese elite politics termed "the Shanghai gang." Those connections later let Jiang retain significant influence long after he had officially left the top echelons of power.