The subject remains politically charged in China. Even while Mr. Xi's relatives were selling off assets, those calling publicly for more disclosure have been punished, including the lawyer Xu Zhiyong, who was given a four-year jail sentence for gathering crowds to disturb public order. The websites of The Times and Bloomberg, which have both reported on elite shareholdings, have been blocked in China for many months.
Ms. Qi, who uses her mother's last name and also goes by the name Qi Lianxin, and her husband began selling off assets owned by their principal Beijing holding company, the Qinchuan Dadi Investment Company, in late 2012, records filed with the country's State Administration of Industry and Commerce show. Qinchuan was set up in the weeks after Mr. Xi ascended to the Politburo Standing Committee in 2007 with $2.7 million in investments, ballooning to $156 million four years later.
At least eight of the 11 investments that Qinchuan disclosed at the end of 2011 are no longer owned by the company, records show.
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Two of the Qinchuan investments were bought by companies run by Shi Weixue, a real estate executive who made headlines recently for his project to build a resort complex on the tropical island of Hainan, including a "seven-star hotel," shaped like apple trees. Mr. Shi's Beijing-based property company, Zhonglianya, was also the majority investor in a Qinchuan-invested property company in the Hubei Province of central China that was liquidated last year.
Luo Zhehong, a property and mining executive from Zhejiang Province in eastern China, where Mr. Xi served as the top official from 2002 to 2007, owned a mining company with Qinchuan in Qinghai Province in western China. Records show that he acquired Qinchuan's 35 percent stake and also bought out its share in a Beijing investment company.
Mr. Shi and Mr. Luo were not available to comment. Ms. Qi and Mr. Deng did not respond to faxed questions asking about their investments.
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Mr. Xiao, in his statement, said his company had contacted Qinchuan about its asset disposals after the publication this month of an article in The Times about his own business empire and political ties.
Shareholders of the company "voluntarily quit their legitimately operated business which they worked very hard to found, costing them their input or bringing them a huge loss," Mr. Xiao said through a spokeswoman.
Mr. Deng, through a Shanghai holding company, also owned more than one-sixth of a rare-earth mining company in the Jiangxi Province of eastern China that last year reported owning assets of about $2.1 billion. Records show that he is no longer a shareholder in the Shanghai company, and even if he were, it no longer owns a stake in the mining company.
In April, that stake was taken over by a state-owned aviation investment company. Rare earths go into critical components in electric cars and wind turbines.
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Ms. Qi, her daughter Ms. Zhang and Mr. Deng still own many companies across China, stretching from Hainan in the south to Beijing in the north. Records examined this month show the couple still owns their Shenzhen-based investment company, Yuanwei, which holds tens of millions of dollars in assets.
Ms. Zhang also remains the owner of a spacious villa in Hong Kong that records show she bought in early 2009, during the depths of the global financial crisis, for $19.3 million. Since then, prices have appreciated significantly.
A visit to the villa this month suggested that it had been vacant for many years. It is falling into disrepair, with the subtropical Hong Kong foliage slowly reclaiming the driveway and sprouting out from below the black and gold steel gate. A villa on the same street recently listed for 238 million Hong Kong dollars, or more than $30 million.
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And the couple did not sell three of its most valuable assets held by Qinchuan, including two infrastructure companies in the city of Xiangyang in Hubei Province. The three assets are together worth at least $234 million.
But on Oct. 8, after no changes in its shareholding structure for almost six years, ownership of Qinchuan itself was transferred out of the family and into the hands of a longtime business associate, Xu Zaisheng, documents filed with the Chinese government show.