Shen Jin had connected all the [Industrial TNT] using [Redstone] (graphite).
It was an excellent material for transmitting signals.
But his stock had always been limited.
First, it had few applications and was rarely found among ordinary people; it was mainly used in smelting and the electrical industry.
Second, the authorities also held relatively small reserves of this material.
Even trading with people from the Government had not brought Shen Jin enough to use freely.
Third, Shen Jin had yet to mine any graphite ore himself.
So when setting up the [Industrial TNT], he had always chosen a "series" circuit that saved [Redstone].
He used a portion of [Redstone] to lay a signal path to the first few dozen blocks of [Industrial TNT].
Once those were detonated,
the subsequent explosions would set one another off in sequence, like a string of firecrackers.
If they were packed closely together, the explosions would spread very quickly.
But the first defensive line they had just set up at Celestial River Mountain,
after everyone's ingenious modifications, covered a wider area and distributed the explosive force more evenly.
The overall setup had become more sensible.
Except!
The explosions did not spread as quickly as they would with a concentrated layout.
On this ten-kilometer "road of death," that had led to the current outcome.
Halfway through the explosions, the zombie horde had reacted.
Led by the Tier 3 Z Zombie, the zombie horde had held out for half a minute under the energy released by another mysterious Giant Zombie, suspected to be Tier 3-4.
They had raised a "T Zombie eggshell."
Using the tough hides and chunks of flesh of the Type T Bloated Zombies, they had withstood the impact of large amounts of [Industrial TNT].
They had saved half the zombie horde.
"So... we can't