On December 18, 1978, the pivotal Third Plenum of the 11th Central Committee was held. At the congress, Deng called for "a liberation of thoughts" and urged the party to "seek truth from facts" and abandon ideological dogma. The Plenum officially marked the beginning of the economic reform era, with Deng becoming the second paramount leader of China. Hua Guofeng engaged in self-criticism and called his "Two Whatevers" a mistake. Wang Dongxing, a trusted ally of Mao, was also criticized. At the Plenum, the Party reversed its verdict on the Tiananmen Incident. Disgraced former Chinese president Liu Shaoqi was allowed a belated state funeral. Peng Dehuai, one of China's ten marshals and the first Minister of National Defense, was persecuted to death during the Cultural Revolution; he was politically rehabilitated in 1978.