At first glance, it is just a photograph of an empty room. But on mainland social media, it has become something else entirely: a virtual confessional. Beneath such posts, users anonymously unburden themselves to strangers, sharing the guilt, anxiety and struggles they cannot voice to family or friends. Traditionally, the confessional in Christianity is a space where believers admit their sins to a priest and seek absolution. Such so-called cyber confession rooms have recently surged in...