Wan Li
From 1975 to 1983, the Chairman of the Standing Committee served as head of state of the People's Republic of China, as the presidency had been written out of the 1975 constitution and was also excluded from the 1978 draft. Theoretically, during the 1989 Tiananmen Square protests, the NPC Chairman at the time, Wan Li, had the power to call an emergency session of the NPC to resolve the issue constitutionally. However, Wan's freedom of movement was restricted, and ultimately rendered powerless in the situation.