"They found it!" This is the moment BBC journalists discovered a spy-cam in a hotel room after months of monitoring. So-called spy-cam porn has existed in China for at least a decade, despite the fact that producing and distributing porn is illegal in the country. But in the past couple of years the issue has become a regular talking point on social media, with people - particularly women - swapping tips on how to spot cameras as small as a pencil eraser. Some have even resorted to pitching tent