It's just that the tracking device, Fu Bo didn't have time to activate it. However, this tracking device can be remotely controlled to activate.
Sun Yaowei and his team, after much searching, found the place where Fu Bo was being held. Fu Bo was in an unconscious state due to being forced to inhale a large amount of gas and severe dehydration. Fortunately, before Fu Bo lost consciousness, he bit his finger and left a string of coded messages on his clothes.
