China’s ruling Communist party has closed the website of a prestigious economist as it launches a campaign against “nihilist” interpretations of former leader Mao Zedong that is stirring up ghosts of the Cultural Revolution.

Chairman Mao’s legacy has became a battleground for “leftists” and “rightists” over the past year, fifty years after he launched the chaotic and violent Cultural Revolution. The rancorous debates come as current president Xi Jinping tightens control over the party and society.

On Friday, censors closed down the social media accounts and website of a think-tank founded by 88-year-old economist Mao Yushi, a frequent target of neo-Maoists (and no relation with the Communist leader), among others. A total 17 websites were taken down for posting “fake news”.