Close relatives of China’s top leaders have held secretive offshore companies in tax havens that helped shroud the Communist elite’s wealth, a leaked cache of documents reveals.

The confidential files include details of a real estate company co-owned by current President Xi Jinping’s brother-in-law and British Virgin Islands companies set up by former Premier Wen Jiabao’s son and also by his son-in-law.

Nearly 22,000 offshore clients with addresses in mainland China and Hong Kong appear in the files obtained by the International Consortium of Investigative Journalists. Among them are some of China’s most powerful men and women — including at least 15 of China’s richest, members of the National People’s Congress and executives from state-owned companies entangled in corruption scandals.

PricewaterhouseCoopers, UBS and other Western banks and accounting firms play a key role as middlemen in helping Chinese clients set up trusts and companies in the British Virgin Islands, Samoa and other offshore centers usually associated with hidden wealth, the records show. For instance, Swiss financial giant Credit Suisse helped Wen Jiabao’s son create his BVI company while his father was leading the country.

The files come from two offshore firms — Singapore-based Portcullis TrustNet and BVI-based Commonwealth Trust Limited — that help clients create offshore companies, trusts and bank accounts. They are part of a cache of 2.5 million leaked files that ICIJ has sifted through with help from more than 50 reporting partners in Europe, North America, Asia and other regions.

Since last April, ICIJ’s stories have triggered official inquiries, high-profile resignations and policy changes around the world.

Until now, the details on China and Hong Kong had not been disclosed.

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