A beijing court sentenced a prominent property tycoon to 18 years in prison for alleged corruption on tuesday in a verdict that will finally silence one of president xi jinpings most outspoken and fearless critics.

According to a statement by the beijing no 2 intermediate peoples court, ren zhiqiang was found guilty of charges including bribery, embezzlement of public funds and abuse of power.

Before his retirement, ren, 69, headed a state-owned property developer in beijing that was involved in a number of high-profile projects in the chinese capital. his one-day trial was held on september 11.

Like mr xi, ren grew up as the privileged princeling son of a chinese communist party official who participated in mao zedongs revolution and later served as a vice-minister.

Rens red pedigree, as well as his close connections with current senior government officials, was widely regarded to have allowed him to speak more freely than many of his peers. nicknamed the cannon, he spoke candidly about government regulation of the property industry and other public policy issues.

But the severity of the sentence is a sign of the partys anger after he began to criticise mr xi directly.

In early 2016, ren castigated mr xi on social media after the chinese president said the primary function of government-funded state media should be to serve the party.

His weibo account, with almost 40m followers, was shut down and his party membership suspended for one year. these were relatively lenient sanctions and ren then dropped out of the public limelight.

Earlier this year, however, ren burst back into public view with a scathing and thinly disguised critique of mr xis handling of the coronavirus pandemic and the presidents increasingly authoritarian rule. mr xi, he wrote, was not an emperor in his new clothes but a bare naked clown.

Ren was subsequently stripped of his party membership and detained by the partys discipline inspection commission, which investigates party members for alleged corruption and other violations of party discipline.

Ren zhiqiang has lost his beliefsand forgotten his duty, the commission said in a statement in july. he is not consistent with the central party leadership on major issues of principle...he vilified the image of the party and the country, distorted party and military history. he is disloyal and dishonest.

The commission also alleged that ren had used state funds for personal expenditures and caused heavy losses of state-owned assets. according to the court, he accepted bribes totalling rmb1.25m ($184,000) and was responsible for state company losses totalling more than rmb110m.

Ren could not be reached for comment. according to the court, he pled guilty and will not appeal the sentence.

Additional reporting by xinning liu