More than a million posts on Gu could be seen on Sina Weibo -- a microblog similar to Twitter, which is banned in China -- after she was found guilty of murder but spared immediate execution on Monday.

"Bigwig gets death sentence with reprieve for murder, while common people get immediate execution. Where's the justice?" posted one user of Sina Weibo, China's most popular microblog.

"If a well-planned murder doesn't deserve a death penalty, then what other criminal deserves immediate execution?" demanded another of the court's decision to give Gu a suspended sentence with a two-year reprieve.

The large number of posts suggested China's censors had relaxed restrictions that had been in place since the wife of former leader Bo Xilai was first placed under investigation in April for killing a British businessman.

Searches for Gu's name had been blocked under the online censorship system known as the Great Firewall of China, but on Monday it was possible to search under her name, and censors appeared slow to delete even critical posts.

As the wife of a high-profile Communist party leader, Gu had been expected to be spared execution, especially after state media reported that she killed British businessman Neil Heywood to protect her son from unidentified threats.

Suspended death sentences are typically commuted to life in prison in China, but the actual length of time served varies.

Political analysts say her trial would have been carefully stage-managed to minimise embarrassment for the party, and her husband's name was never mentioned in connection with the charges against her.

Beijing's efforts to block online discussion of Bo and Gu have been strenuous, reflecting the huge sensitivity of the case ahead of a power handover due to start later this year.

Microblogs have become wildly popular with members of China's booming middle class, who often use the site to share news stories. Sina says it has at least 350 million registered users, mostly in mainland China.

China executes more criminals than the rest of the world combined, according to rights group Amnesty International, although the actual number of people the country puts to death remains a state secret.

But a life of luxury and influence is a distant memory for the wife of disgraced leader Bo Xilai after a court on Monday handed her a suspended death sentence for murdering a British man -- a crime she had confessed to.

Pictured on state television, her hair short and wearing a plain white shirt and black jacket, Gu told the court she accepted the sentence, which "reflects particular respect to the law, the truth and life".

The daughter of a renowned general, Gu, like her husband Bo Xilai, is a member of an elite group in Communist Party-ruled China whose family background has given them influence and privilege not enjoyed by most.

But since her detention earlier this year, a new picture has emerged of an at-times volatile woman with a troubled childhood and a reported history of depression.

Like Bo, she studied at the prestigious Peking University, although the pair did not meet until 1984, while she was on a research trip near the eastern city of Dalian, where he had taken a post as a local party secretary.

"He was very much like my father, that sort of extremely idealistic person," Gu, now 53, told the Southern Weekend, a local weekly, in an interview published in 2009, recalling her first encounter with Bo.

"He lived in a small dirty room. He offered me an apple before telling me about his ideas."

They married two years later and in 1987 had a son, Bo Guagua, who attended one of Britain's most prestigious private schools, Harrow, followed by Oxford University and a postgraduate degree at Harvard.

Gu began work as a lawyer the same year her son was born, later setting up her own firm and winning plaudits as the first Chinese attorney to successfully challenge a legal decision in US courts -- an experience she recounted in two books that became bestsellers in her home country.

Ed Byrne, an American lawyer who worked with Gu, recalled her as "smart, charismatic, attractive". "I was very impressed with her," he said in a television interview.

As her husband's political career took off, Gu gave up law, a sacrifice to which Bo paid tribute at a press conference in March that was to prove one of his last appearances before the couple vanished from public view in April.

He described her as a stay-at-home mother who had given up a promising career to take care of her family, and hit out at allegations -- which at that stage were not yet public -- that he said had been made against her.

Details that have emerged in recent months of Gu's life with Bo, however, suggest that his portrayal of a humble housewife was far from the reality.

She is reported to have spent several years in Britain while her son was at school there -- a place arranged by her victim Neil Heywood.

While in Britain, she stayed at the most expensive hotels and enjoyed access to a private jet owned by a billionaire friend, according to sources quoted in The New York Times.

Despite rising to a position of influence, Gu's life had not always been comfortable.

During the Cultural Revolution her parents were detained and her four sisters sent to the countryside for re-education, forcing her to drop out of school and scrape a living variously as a construction worker, a butcher and a lute player.

On trial earlier this month, she confessed to killing 41-year-old Heywood by pouring poison down his throat, saying that he had threatened her son after a business deal went sour.

Looking noticeably more plump than before, she told the court the case had been "like a huge stone weighing on me for more than half a year", the official Xinhua news agency said.