article: In an exclusive interview with the BBC, the British corporate investigator who became embroiled in GlaxoSmithKline's (GSK) China corruption scandal tells me his story is "a cautionary tale which many people can learn from". The risks of doing business in China, he says, are "on the same scale as the opportunities", and governments, including the British government, "have not been doing a very thorough job of making business understand the risks". "Absolutely any company going to China could be the next party to suffer our fate if they fail to understand this," he says. The fate suffered by Peter Humphrey and his wife Yu Yingzeng was to spend two years in squalid and crowded jail cells, to be denied urgent medical attention and to be separated from each other and from their son. The corporate investigator says it was both a shattering experience and a miscarriage of justice. "None of our staff did anything illegal," he told me. "We engaged third parties to help us with some parts of our work. We always instructed them to follow legal means but had no control over the methods they used." So why the prosecution and the prison term? "It doesn't stack up at all when you analyse our case and the GSK case on the basis of the information you have. It doesn't stack up at all." The couple were corporate investigators who became embroiled in a Chinese police investigation of corruption at GSK. The British pharmaceuticals giant had bribed Chinese doctors and hospitals to buy its medicines. Mr Humphrey and his wife were in no way implicated in that corruption, but had been hired by the company to investigate the source of a secretly filmed sex video of GSK's top boss in China and of whistleblower emails sent to company headquarters in London. "I believe we were collateral damage in a wider dispute between a company and the authorities which led to us being dragged in," he said. Even now, Peter Humphrey is reluctant to discuss the details of the GSK case or of his relationship with his former client. Asked why, he tells me: "It's not impossible that we may sue some of these parties or through other means try to seek redress." He says he watched the TV coverage of the GSK trial from his Shanghai prison cell. The company was found guilty of systematic bribery and fined Â£300m. He was shocked by the contrast between his punishment and theirs. "Suspended jail sentences for three or four of the main culprits when I and my wife had been sentenced to years in prison," he says. "Someone asked me recently why someone like Mark Reilly (GSK China's boss) could be set free and we were in jail. I think it's very simple, we don't have half a billion dollars. That story was about money from the beginning. Money got them into trouble and money got him out." The events which led to these trials took place in the early part of 2013 when China's new President Xi Jinping had just declared nationwide
summary: It's exactly two years since the door of Peter Humphrey's Shanghai bedroom was kicked in by police and he disappeared into a prison nightmare which ended only three weeks ago with his deportation from China.