President Xi Jinping is likely to promote a corruption whistle-blower to China's top military decision-making body to underscore his determination to tackle graft inside the country's rapidly modernizing armed forces, two sources said.

Gen. Liu Yuan, 62, the eldest son of late President Liu Shaoqi, is set to be appointed to the Central Military Commission during a meeting of the Communist Party's elite 205-member Central Committee in October, a source close to the leadership and a second source with ties to the military said.

Security had been stepped up around Liu after he had received death threats for exposing the worst military graft scandal in modern China, which involved the widespread selling of positions in the People's Liberation Army (PLA), three separate sources added.