Inside the shop of "Da Li Blacksmith Shop", five sets of blacksmith tools were lined up in a row. Five teenagers aged fifteen or sixteen were shirtless and wearing cowhide tights. They held hammers in both hands and smashed the red-hot steel ingot on the anvil.

The sledgehammer was heavy, and it made a clanging sound when it hit the steel ingot. Countless sparks flew out. The impurities in the steel ingot were blasted out by the huge force, and the steel ingot was gradually becoming purer.

A dozen younger boys were helping the five boys. They were sweating profusely but they did not dare to be careless. They carried the heavy tongs and kept turning the steel ingot on the anvil.

The young blacksmiths were sweating profusely. They were breathing heavily and hammering down with the hammers in their hands at a strange rhythm. Their breathing was heavy and long, and their chest and abdomen rose and fell rapidly with each breath.

Next to the young men, five blazing furnaces were emitting an overwhelming heat. In each furnace, Chu Tian buried a fire-attributed spirit crystal the size of a soybean. Under the stimulation of high temperature, a small amount of pure spiritual essence of heaven and earth continued to seep out of the spirit crystal.

Chu Tian’s soul enveloped the entire blacksmith shop. The spiritual essence of heaven and earth was divided into more than twenty strands and slowly seeped into the bodies of these apprentices.

The apprentices practiced the "Nine-Turn Heavenly Furnace Method" taught by Chu Tian on their own. The high temperature emitted by the blazing charcoal in the furnace and the spiritual essence of heaven and earth emanating from the small spiritual crystals were continuously absorbed into their bodies.

Their skin was red all over, as red as burning charcoal.

Heat surged in their bodies, and the scalding heat exercised their internal organs, bones, flesh and meridians. As they moved, traces of grey impurities were faintly visible deep in their shiny sweat.

Slowly but firmly, the impurities in these apprentices' bodies were refined out by the Nine Revolutions Heavenly Furnace Method. Their flesh, blood, and bones became purer and their strength increased bit by bit.

In the backyard of Dali's blacksmith shop, more than twenty stoves were burning, and next to each stove was a set of blacksmithing tools. More than twenty young children, ranging from seven or eight years old to eleven or twelve years old, were holding small hammers and smashing the small iron block on the anvil with gritted teeth.

These children were young, not very strong, had never practiced before, and had never taken any elixirs to assist in their practice. Compared to the five teenagers who were just the front of the blacksmith shop, these children had much worse foundations.

If the foundation is poor, there will be teaching methods suitable for poor foundation.

These teenagers outside can already forge fine steel ingots and refine even better quality steel. These children in the backyard can't do anything else, but according to the ratio given by Chu Tian, ​​they are quite capable of using small crucibles to refine certain special alloys.

The children smashed the iron blocks hard. Chu Tian, ​​who was sitting on the doorway between the front shop and the backyard, looked up at the sky with his legs crossed and drank. He said calmly, "The fire is ready. Take the mold and pour the molten iron into the mold carefully!"

A group of children dropped the hammers in their hands, gasped heavily a few times, picked up the tongs beside the anvil silently, and carefully took out the hot crucibles that emitted dazzling heat from the red-hot furnace.

The mold had been prepared next to the furnace. The children gritted their teeth, took out the crucible weighing dozens of pounds and the alloy juice inside, and carefully poured the alloy juice into the mold.

Sparks flew everywhere, reaching more than two feet high.

The children were wearing tights made of animal skins, and the sparks that splashed on their legs only made them sweat more, but did not cause any harm to them.

After a short while, all the alloy juice was injected into the mold. Chu Tian waved his hand and said in a deep voice: "Okay, sit on the ground immediately and practice the skills taught by my master. Hey, this is related to your future achievements, don't be lazy!"

Chu Tian stood up, holding a leather whip with thin iron wire wrapped around the surface, and slowly walked towards the children.

The children did not dare to delay. They hurriedly sat cross-legged next to the mold that continued to emit terrible high temperatures. They pressed their left hands on their chests and their right hands on their lower abdomens, and began to practice the Nine Revolutions Heavenly Furnace Method according to the breathing method taught by Chu Tian.

Wisps of hot air continued to penetrate into the bodies of these children. White steam was seen rising from their heads. The breathing of many children became extremely heavy, and the breath exhaled from their mouths was extremely hot. If a thin piece of white paper was placed in front of them, the white paper would probably burn out of thin air.

Chu Tian nodded with satisfaction.

These children, introduced by several shopkeepers in the surrounding area, are all from honest and decent families.

None of them is lazy or scheming. They have been accepted for seven or eight days. No matter what Chu Tian asks them to do, these children can complete it well.

"Not bad!" Chu Tian nodded with satisfaction.

Looking at these children who were practicing the exercises wholeheartedly, Chu Tian flicked his finger and a piece of red top-grade spirit crystal appeared in his hand. With a force from his right thumb and index finger, the spirit crystal was crushed alive. Chu Tian picked out more than 20 of the smallest fragments and threw them into the furnaces one by one.

A powerful voice came from the blacksmith shop: "Master Dali? Master Dali? We brought a few good brothers here. Hey, can you make a strong bow? At least a strong bow that can withstand 300,000 kilograms of force. If you can, you can pay any price!"

Chu Tian narrowed his eyes.

A strong bow with a force of three hundred thousand pounds?

The measurement scale of the Heavenly Palace here is consistent with that of the Heavenly Land World. It seems that there is a mysterious force that has unified the measurement scales of the two worlds that are extremely far apart. Three hundred thousand catties of force is just the level of ordinary three dragon forces!

Can a bow that can withstand this much force be considered a strong bow?

With a slight smile, Chu Tian walked slowly into the blacksmith shop in front, and said to the big man who came to forge the Santai machete last time, "Yes, of course. But the materials I have here are not good enough for a strong bow that can withstand a force of 300,000 kilograms. If you can find some good materials..."

Several tall men with arms longer than normal people's have, smiled and nodded hurriedly, then untied several large packages from their backs.

In a short while, several animal horns emitting a powerful aura, several python tendons, and a pile of dark metal ore were placed in front of Chu Tian.

Chu Tian grabbed the animal horn and broke it, then picked up a main tendon and pulled it hard.

With a humming sound, the main tendon began to throb violently. Chu Tian used a force of over a million pounds, but was unable to move the main tendon.

"Good materials, but they are used to forge a bow weighing 300,000 jin, which is a bit of a waste! If you can afford it, I can forge a good bow weighing 600,000 jin for you, how about that?" Chu Tian smiled as he looked at the several strong men.

Several men were ecstatic and hurriedly bowed deeply to Chu Tian.