The Source.

Shi Lang was moving the drone closer and closer to the source, when he found many people sitting in a meditative stance but their eyes were open. He managed to confirm that they were only staring in the distance. He could not tell what they were doing. Suddenly, it clicked to him as he mumbled, "They are like the trees." 

The drone moved further and Shi Lang followed through the mapped route slowly, carefully checking for any disturbance. He set the AI installed in the battle suit to take control if he spends more than five minutes in one place and guide him outside the effective range. 

After traveling for ten hours, Shi Lang found himself standing before a spot that scared the hell out of him. He spotted a few dozen men and women standing on their feet as they looked into the distance. He regained his composure and stopped the drone from moving any further as he followed the trail.