 On December 27, 2013, Yang was detained for investigation by the Central Commission for Discipline Inspection of the Communist Party of China for "serious violations of laws and regulations".On December 30, Yang was dismissed from his position for corruption.On July 11, 2014, at the conclusion of the CCDI investigation, Yang was accused of abuse of power, taking "massive bribes", and adultery, and was expelled from the Communist Party of China.