"Please!" Rong Jian, who was walking at the end, immediately paused and turned around.

"Tonight after nine o'clock, uh, now I should say last night, when I went out after nine o'clock, I saw a cleaning aunt knocking on her door. I didn't think much of it at the time, but now that I think about it, I think it's very wrong, because there's no way a cleaning auntie wouldn't be off work that late. Unless this cleaning aunty is a relative of her family."

This clue immediately aroused ...