The Northern Land is vast, and searching for a caravan is no easy task. In the dead of night, when everyone is deeply asleep, Zhang Chen transforms into a vampire bat and soars into the sky, gliding through the night to begin his search for nearby large human gatherings.
The whole Northern Land is shrouded in darkness, with few campfires flickering; after all, now that the Northern Land is teeming with demon beasts, anyone daring enough to light a campfire isn't ordinary.
Zhang Chen emits ultrasonic waves, watching them spread through the mountains. After surveying several hundred miles, he finally finds a large gathering of people.
The sizeable group numbers several thousand, shrouded entirely in darkness. Though there are campfires burning, they are surrounded by tents, enveloping the firelight so it doesn't leak out. If not for Zhang Chen's mastery of ultrasonic waves, finding their tracks would have been quite challenging.
