China is investigating the former head of state-owned Bright Dairy & Food on suspicion of serious disciplinary violations, the country’s anti-graft watchdog said on Wednesday, using its usual euphemism for corruption. The regulator has opened an investigation into Guo Benheng, who left the firm last month, the Central Commission for Discipline Inspection’s Shanghai branch said, without giving further details. China’s top graft-busting agency lambasted the country’s powerful state-owned industries this month for being riddled with corruption. President Xi Jinping has warned that official graft is serious enough to threaten the Communist Party’s legitimacy and has vowed to go after powerful “tigers” as well as lowly “flies”. Guo left Bright Dairy last month for “personal reasons”, Bright spokesman Pan Jianjun said. He added that the investigation would not have any impact on the company’s business and that he did not know any further details about the probe. Bright Dairy’s state-owned parent Bright Food Group has been one of the most active Chinese firms on the global market, snapping up deals for international firms from Israeli foodmaker Tnuva to British cereal brand Weetabix. Beijing is expected to unveil a master plan to reform the powerful state-owned sector, but one has yet to be published. Senior executives at automaker China FAW Group Corporation, Baosteel Group and China National Petroleum Corp have been put under investigation for corruption this year.