C309 The mysterious closed factory

Following the researchers's footsteps, Chu Feng got closer and closer to the factory, the big door was closed, and it was even unlocked with fingerprints, making it difficult for Chu Feng. Just as the researchers were about to enter, Chu Feng moved, and grabbed onto one of the people's neck.

Before even making a sound, that person had already died, Chu Feng of course had used a clever move