A swimming pool! It was filled with water.
The water was clear, making its depth hard to judge by sight alone.
Standing beside the pool, Shen Bing looked utterly baffled. What happened to the equipment they promised? Why a swimming pool? Could it be swimming gear? A bikini?
Of course, Shen Bing would never dare say that aloud. Several gray-haired researchers were standing beside him.
These were definitely serious researchers—far more serious than he was, at least.
Nor were Shen Bing, Gao Jingchuan and his son, and the researchers the only people present. Several military leaders were there as well.
"Old Gao, you didn't bring me here just to look at a pool of water, did you?" Shen Bing asked.
"Of course not!" Gao Jingchuan replied.
No sooner had he spoken than ripples suddenly spread across the surface. Gao Jingchuan had thrown a pebble into the pool.
With a muffled pop, like a silenced gunshot, the pebble was instantly pulverized into dust that dispersed through the water.
A moment later, a young researcher jumped into the pool. After feeling around for a while, he climbed out with his arms curved around what seemed to be an invisible object.
Once ashore, he moved his fingers over a certain spot, and a strange object appeared in his seemingly empty hands.
It was roughly two feet long, had four wheels, and looked like a vehicle.
The four wheels were rather unusual. They were oversized relative to the rest of the device, with blades in their centers that resembled propellers.
An elderly researcher glanced around the group, his gaze lingering on Shen Bing for a few extra seconds. "Mr. Shen, distinguished leaders, the item before you is our newly developed All-Terrain Automatic Patrol Unit."
"What we just tested were this Patrol Unit's underwater stealth