Updated

Disgraced former Community Party Chief Bo Xilai launched a heated defense in his corruption trial Thursday, denying claims that he took millions in bribes from businessman and testimony from his wife that the cash was stored in safes, calling it "comical, very funny."

It appeared to be a last-ditch effort by the former political star to repair the reputation he had so carefully cultivated of being a man of the people.

Once the powerful party boss in the megacity of Chongqing, the charismatic Bo fell into disgrace early last year following revelations that his wife, Gu Kailai, had killed a British businessman, and that he had allegedly attempted to cover it up. Thursday marked the first time he was seen in public in 18 months, since shortly after the scandal emerged.

Prosecutors said Bo used Kailai and his son, Bo Guagua, as intermediaries in accepting $3.5 million in the northeast city of Dalian, where Bo Xilai once held key posts. They also alleged that Bo instructed an underling to keep quiet an $800,000 payment to the city, and that Bo diverted the money into personal funds with the help of his wife, according to updates on the microblog site Sina Weibo posted by the Jinan Intermediate People's Court.

Prosecutors presented written testimony from Bo's wife that said the couple kept safes in their various homes across China in which piles of cash were stashed, but Bo raised doubts about her account.

Calling her testimony "comical, very funny," Bo also questioned Gu's suitability as a witness, saying she was a convicted killer with a history of mental illness. But in further questions he chose more gentle words in describing his wife as "a person of culture and taste, a woman of modern thinking."

In photos and state TV footage from the court, Bo was shown standing in the dock wearing a white long-sleeved dress shirt and dark slacks. His hair was cut short and grey, and he later sat somewhat slumped in a chair with little expression on his face.

"I'm not a perfect man, and not a strong-willed person, I'm willing to take responsibility for that," Bo said. "But as to the basic facts of whether I am guilty or innocent, I must say my piece."

Bo's verbal sparring displayed the media-savvy politician's keen sense of how to portray himself well in tough situations. He thanked the judge for letting him speak, asserted that he was pressured into making a confession and was selectively contrite.

Bo said he had been coerced into falsely confessing to party investigators that he had taken payments from a general manager of a company owned by the Dalian government.

"I once admitted this matter against my will," Bo said. "However, at the time, I had absolutely no knowledge of the nature of the matter. My mind was a total blank."

The trial is widely presumed to have a predetermined outcome: conviction. But in an unusual display of openness for a major political trial in China, court officials released frequent microblog updates on the testimony, suggesting ruling Communist Party officials are confident of minimizing damage from a scandal that exposed a murder and machinations among China's elite.

Prosecutors also said Bo helped a Dalian businessman, Xu Ming, in efforts to buy a football club and obtain land for a hot-air balloon project without proper procedures. They said Xu helped Bo's family finance the purchase of a villa in Nice, France, and that Xu bought a Segway, an electric stand-up scooter, for Bo's son. Bo denied the accusations and said the two were not even friends.

Bo cross-examined Xu, forcing him to repeatedly concede that he had not directly raised such matters with Bo.

The prosecution said the confession obtained from Bo was valid and defended the testimony provided by Gu and Xu.

After about eight hours of testimony, the trial went into recess and was to resume at 8:30 a.m. Friday.

Bo entered the courthouse Thursday in a convoy under police escort. Though kept far away from the media, some of Bo's supporters gathered outside a security perimeter, intermittently yelling, "He served the people!" and "He was a good cadre!"

"It's definitely the last performance of Bo Xilai on the platform of history," said Zhang Lifan, a Chinese historian and political analyst. "Bo is a man with no bottom line and for him, if his political life is ruined, it would be equal to killing him."

"He knows that he's a banner to many of his fans and it's his last chance to go all out to defend his reputation," Zhang said.

Despite Bo's feisty defense, a verdict of guilt against Bo is all but assured because the outcome of trials involving high-profile politicians in China are usually decided in backroom negotiations by politicians and handed down by the court.

"It's very much like a martial arts demonstration," said Ding Xueliang, a Chinese politics expert at Hong Kong University of Science and Technology. "You hit somebody in the face, he hits you back, but eventually nobody gets badly injured and the result has been previously discussed and managed."

The Associated Press contributed to this report.