He Feiyu asked for a plate of stir-fried beast meat on the third floor of the Buyizhuang Restaurant, and a jar of thousand-year-old fruit wine, and poured himself a drink, and after a while, there was a sound of footsteps at the staircase, and Bai Youtian walked up.

"Elder Bai, sit down, Xiao Er, and have another plate of boiled yak meat and a plate of mapo jade tofu. ”

Bai Youtian sat opposite He Feiyu, took out four jade slips and handed them to him, and said, "This is the jade slip you gave me, is there anything else?"

"Yes, I bought five jade slips from the market two days ago, you can take them back and read them first!" He Feiyu handed over five jade slips.

"Oh, okay!" Bai Youtian took the jade slips and continued to ask, "I have a few questions about these jade slips......

Bai Youtian and He Feiyu had a heated discussion, and they had been discussing for three hours, and Xiao Er served two more dishes and a jar of wine, and both of them ate and drank up.

"Okay, Senior Nephew He, let's stop here today, I'll go back and study these jade slips, and then I'll come to you for advice!"

"Elder Bai is very knowledgeable and quick-witted, which is admired by the late students, if Elder Bai has any questions, just ask me, even if I can't answer, you can go back and ask the elders of the sect, and everyone will make progress together!"

"You're polite, you must be!" Bai Youtian said and went downstairs!

He Feiyu paid for the wine and rice himself, and also walked in the direction of the Heavenly Instrument Sect.

Back in the Medicine King Valley, Bai Youtian took out the jade slips that He Feiyu had newly bought and studied them carefully.

After another five or six days, Bai Youtian digested all the jade slips and began to prepare the refining weapon.

He planned to refine an explosive weapon first, the Thunderbolt Fire Bead, which was similar to the Explosive Talisman, but better than the Explosive Talisman.

Bai Youtian studied chemical engineering in his previous life, and he knew the power of explosives, but the thunderbolt fire beads in this world can only explode if they are guided by the formation, so all the refining masters are masters who are proficient in the formation!

Bai Youtian didn't know anything about formation before, but there was a book called "Basic Formation" in the book He Feiyu gave him, which was more than enough to make the simplest Thunderbolt Fire Bead.

Bai Youtian came to Fang City alone to collect materials, and the production of Thunderbolt Fire Beads requires black powder and refined iron, but these are all said on the earth, in this world, to make Thunderbolt Thunder Fire Beads, you need black flint and dark iron ore, as well as pan primordial water for cooling, furnaces for refining and all kinds of miscellaneous things.

Bai Youtian turned around and basically bought all the things, in fact, this can only be improvised, in a small place like the capital of Tianshui Kingdom, there is really nothing particularly good, but just refining a thunderbolt fire bead is enough!

Back in the Medicine King Valley, Bai You remembered that there was no earth fire, although the Medicine King Valley also had earth fire, but at that time, the firepower and temperature used for alchemy were not enough, and if you really wanted to refine the weapon, you had to go to the Heavenly Weapon Sect.

So Bai Youtian burned a transmission note to He Feiyu and asked him to lead him to the Heavenly Weapon Sect to rent a fire room, and He Feiyu agreed.

After a while, Bai Youtian came to the gate of the Heavenly Weapon Sect, He Feiyu was already waiting there, and when he saw him, he smiled and said, "Elder Bai has started refining weapons, congratulations!"

Bai Youtian also arched his hand and said with a smile: "I'm also trying to test it, I hope I can succeed!"

He Feiyu took Bai Youtian into the gate of the Heavenly Instrument Sect, the Heavenly Instrument Sect is located near an active volcano, after several generations of construction, the earth fire is connected to many places in the Heavenly Instrument Sect, debugging, detonating, strengthening, pruning all kinds of buildings, and gradually forming today's scale, every year, there are many foreign merchants and individuals come to the Heavenly Instrument Sect to order all kinds of utensils, weapons, armor, all kinds of organs, the business of the Heavenly Weapon Sect is hot, more than the Medicine King Valley.

There are also a lot of flowers and plants planted in the Heavenly Weapon Sect, but like the Medicine King Valley and the Divine Rune Gate, the Heavenly Weapon Sect also planted flowers and trees that are used in refining weapons.

After passing through several corridors, Bai Youtian and the two came to a valley, which was full of large and small earth fire houses, all for the use of disciples.

He Feiyu took Bai Youtian to the house where the deacon was, a middle-aged man was looking through the jade slips there, and when he saw them coming in, he smiled and said, "It's Feiyu, don't you have your own earth fire room?

He Feiyu took a medium-grade spirit stone and handed it over, and said with a smile: "This is Bai Youtian, the eighth elder of the Medicine King Valley!"

As soon as the deacon saw the spirit stone handed over, he immediately understood, and said with a straight face: "Although there is no rule that this fire house must not be used by outsiders, but I am also honest in doing so, but if it is Feiyu and your friend, it is not a violation to think about it, so let's not take it as an example!"

"It's not okay if you don't make an example!" He Feiyu said, "Elder Bai plans to learn refining weapons, I'm afraid he will often use this earth fire room!"

"If that's the case, at least one elder needs to speak, and I can't be the master. ”

"Elder, I'll go and say it. He Feiyu said, "Please make it convenient today." ”

"Okay, okay, for the sake of the spirit stone, I'll make an exception, but I must come out within three days!"

"This is natural!"

So the deacon simply registered, gave Bai Youtian the key and token, and then immersed himself in reading the jade slip.

Bai Youtian came to the Earth Fire Room, closed the door and locked it, and began to observe everything here.

This is a small room, about 100 square meters, in the middle of a ground fire mouth, with a variety of special materials to make a formation shape, the earth fire erupts from here, it is blessed by the formation, becoming more rapid and high-temperature, just suitable for refining weapons.

Bai Youtian put the furnace for refining his newly bought refining weapon on the ground fire, and then turned on the fire to feel it, the flames were raging, it was different from the earth fire in the Medicine King Valley!

"Let's start refining!" Bai Youtian took out a bunch of things he had bought and refined them in the way of the thunderbolt fire beads in his memory.

The first step is to process the black flint with ground fire. This step was simple for him, he put the black flint in a container and slowly melted it. After a long time, the black flint turned into a pile of powder in the container, which is what the earth calls black powder.

The second step is to use fire to melt the bastarite. Still using that container, he put the iron ore in the container and slowly melted it on the earth stove, and after a while, the iron ore melted into molten iron.

Then Bai Youtian pointed with his hand, and the powder made of black fire stone floated in the air, forming a spherical shape, and then with a finger of his hand, the molten iron melted by the dark iron ore wrapped the black powder, and Bai Youtian accurately shaped the shape,

until it is made into a precise spherical shape.