Another episode without the main character, the setup up continues, Every episode they keep repeating and reminding the audience, "OUR MAIN CHARACTER WILL FIGURE THIS OUT AND CHANGE THE TIDE", while our main character revealed nothing, assuming to be revealed in one go, "Look our smart the main character is, who has done nth for the past 6 episodes." I can't agree with this long of a setup without proper showcase of the main character's thought. Regarding how the empty castle stratagem is used here, seems like a mix of the stratagem and what zhugeliang is known for, reading the weather and making it seems like heaven's will.