Chapter 662: Chapter 655: Should Be Graceful

The nuclear bomb was placed into a deep well, then a layer of sand was used to pad around the well's mouth. At last, an M1A2 tank was driven over the well opening.

The seal wasn't particularly good, but it was enough.

"Time!"

Zhang Yong immediately put an electronic timer in front of Gao Yuan, which showed there were 42 minutes and 37 seconds remaining.

Watching the countdown on the timer, Yang Yi had not a moment's hesitation. He entered 42 minutes and 40 seconds into the timer.

Watching Yang Yi enter the numbers, Zhang Yong hesitated for a moment, but then he still couldn't help saying, "Will the time be a bit too short? Just three seconds? Shouldn't we set it for an hour? What if the Serpent People are late? What if the altitude isn't enough? Manual operation might be more suitable, right? I'll stay behind to prepare for manual detonation."