She secretly arranged for a waiter to appear to lead Jian Ran out of the hotel, but in reality, she was actually taken near the Gu Mochen's room where he had been drugged.
Even the surveillance in the room had been all set.
Only... what she hadn't anticipated was...
Although Gu Mochen had been drugged, he had chosen to deal with it in the dark... and although she had used infrared...
When the two were entangled, it seemed that Jian Ran inadvertently splashed the water cup towards the electrical circuit, burning out the entire room's wiring.
So... all the evidence she had wanted to capture in the room was gone.
Dong Qin was deeply frustrated by this turn of events.
Afterwards, Gu Mochen's actions became even more inscrutable, and finding another opportunity had become as difficult as ascending to heaven.
Later on, she still held a fear of Gu Mochen's power.