"The state conglomerates, they are empires unto themselves. They have too much money and too much power," said Willy Lam, an expert on party politics at the Chinese University of Hong Kong. "This could be a signal that the Xi Jinping and Li Keqiang leadership is finally trying to discipline them and keep a tighter rein over the conglomerates."
A prominent Chinese newspaper, the 21st Century Business Herald, cited unidentified "insiders" Tuesday as saying Jiang had been close to now-disgraced politician Bo Xilai. Bo, whose downfall was triggered by a scandal involving his wife's murder of a British businessman, stood trial for corruption and abuse of power late last month.
The newspaper said when Jiang was at CNPC, he built oil refineries in places where Bo held leadership positions, including Liaoning province and the megacity of Chongqing, to enhance Bo's "political performance." Calls to CNPC's spokesman's office rang unanswered.
Also Tuesday, some state media outlets including the People's Daily reported that Zhang Shuguang, the former head of the transport bureau at what was then the Railways Ministry, has been charged with accepting more than 47 million yuan ($7.6 million) in bribes between 2000 and 2011.
Unconfirmed news reports also earlier said China's leaders have taken the unusual step of endorsing a corruption investigation into Zhou Yongkang, a former security czar and CNPC general manager with a power base in the oil industry.
The probe into China's oil giant also has extended to one of the energy industry's richest self-made entrepreneurs, Hua Bangsong, chairman of Shanghai-based Wison Engineering Services Co., which is a PetroChina supplier.
Wison said that Hua was "assisting the relevant authorities" in their investigations.
The company, which provides engineering and construction services to the oil industry, said its board of directors "is convinced that factual circumstances will be clarified."
Wison tried to distance itself from PetroChina, a major customer, after recent news reports on their business relationship. It said PetroChina's first-half contract revenue was insignificant.
Wison "operates legally and completed the necessary compliance check" required to list its shares on the Hong Kong stock exchange, the company said in a statement to the exchange posted late Monday.
Hua, who founded Wison in 1997, is worth $1.2 billion, according to Forbes.
___
Associated Press writer Kelvin Chan in Hong Kong contributed to this report.