A VCD film on Big Spender's arrest and conviction has been made by the Guangdong Public Security Bureau (PSB) and is being sold on express trains running from Hong Kong to Guangzhou.
The co-producers - which include the Guangdong Television Station and the Guangdong Province Language and Audio Publishing Society - said the bureau would not profit from sales of the video compact disc.
Chai Zhaobo, a programme producer for the TV station, said: 'The profits will go to the publishing society. They invested the money for the project.
'We made the VCD and the PSB merely provided the exclusive interviews and other material. They were supportive of the project.' Mr Chai said the VCD was produced due to huge interest in the case.
The VCD - which comes with a book on Cheung and his crimes - is being sold for $35 by train attendants while they sell dried squid and other snacks.
The VCDs also can be found in mainland video stores. Mr Chai said: 'They're popular. They're selling well.' Alan Abrahams, chairman of Amnesty International's Hong Kong section, was sceptical that no profits from the VCD would end up in the Government's hands. He said it would trouble him if the PSB profited from the sales.