Qian Guran was already discovered when he entered the E-Times District.
Since the kidnappers were fishing for information, they would leave clues. However, the manner in which these clues were left needed to be well thought out: it could not attract police attention, yet it needed to signal to Hidden Moth that He Kao and Gao Xue'e had disappeared due to a kidnapping.
The kidnappers' original plan was to extract the identity of Hidden Moth from He Kao and Gao Xue'e. Even if they didn't know, the kidnappers aimed to pinpoint suspicious targets. The second step of the plan was for them to call for help, luring out Hidden Moth.
Hidden Moth, knowing the news, would first need to go to the kidnapping scene to confirm the situation, specifically Gao Xue'e's home and where He Kao lived. They had stationed people in both areas for surveillance to further narrow down Hidden Moth's identity.
