At the party, Yu Zhihui and Ghost Shadow were constantly within the sight of Yang Shu and the others.
The departure of Mei and Lan did not attract the attention of Yang Shu and the others. After all, Mei and Lan were unfamiliar faces and had no contact with Yu Zhihui and Ghost Shadow. With so many people and noise at the party, the disappearance of two people was not considered a big deal.
Yu Zhihui had naturally notified Mei and Lan through secret channels and arranged tasks for them, so it was impossible to arouse suspicion.
