Cui Qishan had selected a social media dating case, or better said, a meet-up murder case, which belonged to a new era of tough cases.
First of all, such cases were characterized by a delay in discovery; when a victim travelled to a different place and couldn't be contacted for several days, it was easy for friends to view it as normal. By the time a report was filed, a lot of time had already passed. Plus, the reports were usually filed at the departure location rather than where the crime occurred, complicating the police response.
Sometimes, they didn't even know where the victim had actually gone, which posed an even higher level of difficulty.
