While institutional rules has, since the 1980s, played a major role in the selection of Central Committee members, it does not "guarantee" that holders of a specific office will gain a seat on the CC. If a CC member is transferred to a different post, they maintain their CC membership. For example, a Governor of Shandong who is transferred to a position of less significance does not lose his seat on the CC, neither will his successor gain a seat on the CC. This has created situations in which individuals who do not sit on the Central Committee assume provincial leadership positions. An individual already provisionally named to a provincial leadership post may also be rejected by the "more candidates than seats" voting method – as appeared to be the case with Li Yuanchao (then Jiangsu party chief) in 2002, and Yang Xiong (mayor of Shanghai) in 2012.