Hu Xiaomei, director of the Honghuagang district drug-control office in Zunyi, says separating the punishment of traffickers from the treatment of drug users was crucial for making the new approach work.

ECONOMIST: Rehabilitating drug users

Following the allegations earlier this year, the bank was negotiating with the Fed Bank of New York, the Office of Foreign Assets Control (OFAC), the District Attorney of New York's Office and the Department of Justice.

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On May 13, the district attorney's office replied saying they "are not in possession, custody or control of any document responsive" to the request.

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