Mr. Xu, once listed by Forbes as one of the 10 richest people in China, has been detained since spring 2012 and is also expected to be criminally charged. Mr. Xu entered into real estate ventures in Chongqing after Mr. Bo became party chief there in December 2007, and he made frequent trips on his private plane to the city. Mr. Xu was part of an inner circle of Bo family allies that included Ma Biao, a business executive, and Yu Junshi, a former military intelligence officer who served as a Bo family fixer. All were detained in spring 2012.

Last August, Mr. Bo’s wife, Gu Kailai, was given a suspended death sentence, which usually equals a life prison term, for murdering Neil Heywood, a British business executive whose body was discovered in a Chongqing hotel room in November 2011. In February 2012, the Chonging police chief, Wang Lijun, fled to a nearby American consulate to tell officials there of the murder.

Several political analysts said Mr. Bo’s punishment could range from a prison term of 15 to 20 years to a suspended death sentence. Like those of his wife, Mr. Bo’s upcoming court sessions are expected to amount to little more than a show trial, in which a verdict has already been negotiated by Communist Party leaders.

Mr. Bo would be the first Politburo member to be tried on criminal charges since 2008, when the former Shanghai party secretary Chen Liangyu was sentenced to 18 years in prison for corruption.