The court-appointed receiver empowered to seize the assets of a Chinese company facing accounting questions says he has obtained control over subsidiaries of the company, and is in the process of gaining control over some of its bank accounts.

The moves by the receiver, Robert Seiden, increase the pressure on China's ZST Digital Networks Inc. (ZSTN), in a high-profile case that may test the extent to which investors can hold U.S.-traded Chinese companies accountable for losses they have suffered because of the companies' accounting and disclosure problems.

In an interview with The Wall Street Journal, Mr. Seiden said he has taken over ZST Digital subsidiaries in the British Virgin Islands and Hong Kong. He has also gained control of a ZST bank account in Hong Kong, and is in the process of doing the same with ZST bank accounts in China.

In addition, earlier this week Mr. Seiden, armed with an order from a New York federal judge, seized records from the New York offices of Crowe Horwath International, a global network of accounting firms whose Hong Kong affiliate is ZST Digital's independent auditor. That follows two similar seizures Mr. Seiden made last month at the Brooklyn, N.Y., home of Henry Ngan, ZST Digital's chief financial officer, and the Manhattan offices of Taylor Rafferty, the company's investor-relations firm.

Mr. Seiden hopes to use the seized records to locate other ZST Digital assets. He declined to put a dollar figure on the value of the assets he has seized thus far.

"We are aggressively on multiple fronts hunting down assets," he said.

Mr. Seiden was appointed receiver of ZST Digital in March, as part of a novel remedy granted to a U.S. investor by the Delaware Court of Chancery. The court gave Peter Deutsch, a major shareholder in ZST Digital, the right to force the company to buy back his shares for more than $32 million--Mr. Deutsch had won a judgment requiring the company to open its books to him, but ZST Digital ignored the ruling, and so the judge penalized ZST Digital by awarding Mr. Deutsch a "put option" to force ZST to buy his shares back at above-market prices.

Mr. Seiden, the president of New York forensic-investigation company Confidential Security & Investigations, was tasked with seizing and selling company assets to satisfy that judgment. Some observers have suggested Mr. Seiden could have difficulty--ZST's assets are substantially inside China, and China has previously refused to cooperate with U.S. regulators in efforts to crack down on potential accounting fraud at Chinese companies.

If Mr. Seiden is successful, however, it could offer angry investors a potential strategy to use against other Chinese companies. Many such companies have seen their shares plunge in the wake of accounting and disclosure problems in the past two years, leading to billions of dollars in investor losses.

Mr. Deutsch has said he believes ZST Digital and other Chinese companies have "gone dark"--withdrawn from U.S. exchanges and stopping filing with the Securities and Exchange Commission--to intentionally depress their stock prices and enable the companies to go private at lowball levels.

ZST couldn't be reached to comment.

Crowe Horwath International has no information pertaining to ZST, said Kevin McGrath, its chief executive--the global network includes the Crowe Horwath Hong Kong affiliate that is ZST's auditor, but the network doesn't do any accounting work itself. Nonetheless, he said, the company "tried to be cooperative" with the receiver.

Mr. Ngan and Taylor Rafferty couldn't be reached to comment.

Write to Michael Rapoport at Michael.Rapoport@wsj.com

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