From the arts school, Zhao Yu didn't drive, but instead walked toward Lan Shuping's house, along the route where Lan Shuping's daughter usually headed for school. On the way, Zhao Yu looked at the situation nearby carefully.
He felt that the mysterious kidnapper could have kidnapped her successfully, because he had first done his homework well. He obviously had trailed and observes her, at the very least. So, with this in mind, if they were to rewatch the surveillance video again, they might be able to find a new clue.
He immediately called Mao Wei to remind him about that angle. But, Mao Wei told Zhao Yu that they had already gotten all the surveillance videos, including the ones within the housing area, and that they were already checking them.