It turned out that Ao Jie No. 3's appearance was activated by a Gu worm, which was controlled by Lin Shu. Although Lin Shu was in the capital, it didn't prevent her from controlling Ao Jie because both of them had Gu worms on them. This Gu worm was called the mother and child Gu worm. As the name suggested, as long as they controlled the mother Gu worm, they could control the mind of the host through the child Gu worm.
Most importantly, there were countless child Gu, but only one mother Gu. If the mother Gu died, all the child Gu would die. On the contrary, even if a child Gu died, the mother Gu would still be safe and sound.
It was obvious that Lin Shu had been invincible right from the beginning and was unafraid of Qiao Yanhui at all, because Qiao Yanhui wouldn't let his brother die.
"Is there a cure?" Qiao Yanhui asked while suppressing his killing intent.