According to The Times, the Chinese Embassy in Britain is trying to prevent Channel Four from broadcasting a documentary about child trafficking in China. From The Times:
The programme makers filmed undercover in China, speaking to parents who had had a child stolen or had sold a child, and to traffickers. More boys are taken than girls because they will grow up to earn more money. Most are taken for childless couples, although some are sold into prostitution.
Channel 4 has already conceded a right of reply at the end of the programme to the Chinese embassy. [Full text]
A preview of the film is on YouTube (via Shanghaiist):



