The color of the steel rapidly cooled and darkened.
Lin Yu'an knew he only had a few tens of seconds of effective operation time.
When the color of the steel faded back to dark red, losing its optimal plasticity, he immediately stopped hammering.
Without any hesitation, his arm muscles tensed again, using the long handle to steadily lift the heavy steel rod and return it to the furnace once more.
But this time, his operation was completely different from before; he did not recklessly plunge the tip of the steel rod all the way into the depths of the furnace like the first time.
His eyes squinted slightly, peering through the gap in the operation opening, staring intently at the charcoal-built interior of the furnace while carefully adjusting the angle and depth of the long handle in his hand.
Then, he precisely positioned the part he had just hammered and initially flattened to stay in the "medium temperature zone" in the middle of the furnace.
