令计划
In March 2013, Su became one of the 23 vice-chairmen of the 12th Chinese People's Political Consultative Conference (CPPCC). The position enjoyed the official ranking as a "national leader". However, in June 2014, the Communist Party's anti-graft watchdog announced that he was being probed for "disciplinary violations", which typically indicate corruption. At the time of the announcement, he was the highest-ranking official, and only "national leader"-class figure, to come under investigation for graft since Xi Jinping became General Secretary of the Communist Party in 2012. Several other senior officials of Jiangxi province had already been under investigation, including vice governors Yao Mugen and Zhao Zhiyong, and vice-chairman of the provincial congress, Chen Anzhong. His CPPCC colleague and former Hu Jintao aide, CPPCC Vice-Chairman Ling Jihua, was also detained for corruption in December 2014.