Su Xuan was shocked, his right foot tapped the ground, and his body instantly moved rapidly toward the source of the sound.
"Alert the perimeter, someone's approaching!"
At that moment, several men in the laboratory spoke seriously. These men were none other than the Four Great War Generals of Heaven, Earth, Mysterious and Yellow. These four were all upper-level ninjas, possessing extraordinary strength. At this time, Su Xuan rapidly approached them, and they already sensed it, their hearts also somewhat excited. They felt the approaching person was indeed a master; it had been a long time since they had contended with such a master, and they were a bit exhilarated. The Four Great War Generals of Heaven and Earth clenched their fists, while Su Xuan halted about ten meters away from them, clearly sensing the presence of a master ahead, and a rather skilled one.
