He began to carefully pull the rope. The weight of an adult wolf is only about 30 to 50 kilograms, which is easy for Lu Fan, whose body has been enhanced.

With each pull, he would stop to check if the surrounding salt mine had loosened, fearing it might cause a collapse.

Big Horn also helped by using its strong horn to brace against the nearby rocks and prevent them from slipping.

With the combined efforts of the man and the deer, Dahei was finally pulled up.

It was covered in salt and looked quite disheveled, but thankfully it wasn't injured.

As soon as Dahei came up, it snuggled close to Lu Fan, wagging its tail incessantly, as if telling him about the fear it had just experienced.

"You idiot, you scared me to death." Lu Fan said, stroking Dahei's head.

The live stream chat erupted in cheers.

"Thank goodness, Big Black is alright!"

"Lu Fan is amazing! He successfully rescued Dahei!"

"To be honest, Lu Fan's strength is really great, it feels about the same as Ling Yue's."

"In terms of physical fitness, the two of them may be about the same, but in terms of survival, I personally feel that Lu Fan is still better."

"That's true. Lu Fan is widely recognized as the number one wilderness survival expert."

Lu Fan patted Dahei's body to help him brush off the salt.

"Hmm, what is this?"

Suddenly his finger touched a particle with a rather peculiar texture. Upon closer inspection, it turned out to be a small, slightly yellowish crystal.

[Fragments of saltpeter found]

Lu Fan's eyes widened instantly, and a surge of joy welled up inside him.

He carefully searched through the black fur again and, sure enough, found several more grains of saltpeter.

"Salt water, it's actually salt water, hahahaha."

Lu Fan shouted excitedly.

The live stream chat instantly erupted in excitement again.

"What? Saltpeter? Isn't that what makes ice?"

"Holy crap, Big Black has fallen into a treasure trove!"

"Lu Fan's luck is just too good!"

Wang Tao and Zhao Hangjun were also taken aback by this sudden news.

Wang Tao said excitedly, "Teacher Zhao, this is such a pleasant surprise!"

Zhao Hangjun chimed in at the opportune moment, beginning his science popularization session: "That's right."

The saltpeter ice-making method is actually a method of making ice by utilizing the principle that saltpeter absorbs a lot of heat when it dissolves in water.

In ancient times, people would put saltpeter into water, wait for the water to freeze, and then take out the ice to preserve it.

This method, though primitive, was extremely practical in ancient times before modern refrigeration technology.

"Teacher Zhao, besides making ice, what other uses does saltpeter have?" a viewer asked curiously in the live chat.

Zhao Hangjun smiled and continued to explain: "Saltpeter has many uses. Besides making ice, it is also an important chemical raw material."

It can be used to manufacture gunpowder, fertilizer, etc.

Furthermore, saltpeter also has certain medicinal applications, such as treating some skin diseases.

The audience listened with great interest, marveling at the wonders of saltpeter.

"If he can make gunpowder, does that mean that God Lu Fan can make explosives?"

"Maybe it can even be used to make guns."

"Making guns is too difficult; we don't have the precision instruments for that."

"Be bolder. With Lu Fan's abilities, it's no problem for him to make gunpowder in one day, a pistol in two days, and an airplane or rocket in three days."

Lu Fan looked at Dahei and said with a smile, "You silly dog, you're just lucky."

He crouched down and gently stroked Dahei's head. Dahei seemed to sense Lu Fan's joy, wagging its tail, sticking out its tongue, and looking smug.

"Now that we've discovered saltpeter, I have to go down and take a look. There might be a lot down there," Lu Fan said, his eyes revealing determination.

He was well aware of the importance of saltpeter.

With the weather getting hotter these days, meat will become harder to preserve, and simply using pickling methods also carries the risk of spoilage.

Besides, who would want to eat cured meat when there's fresh meat to eat?

With saltpeter, not only can ice be made to cool down in the hot wilderness, but it can also be very useful in various situations that may be encountered in the future.

Lu Fan checked the rope tied to the salt rock again to make sure it was secure.

Then, take a basket and fill it with saltpeter.

"Big Horn, wait for me up there. If anything happens, shout loudly."

Lu Fan patted Big Horn's neck and said. Big Horn seemed to understand, let out a "moo," and rubbed its head against Lu Fan.

Lu Fan slowly descended along the rope, observing the surrounding rock walls as he went.

On the rock wall inside the crack, he could vaguely see some white crystals shimmering with light, and his heart grew more and more excited.

The viewers in the live stream watched the screen with a mix of tension and excitement.

Wow, I can't wait to see what great Lu Fan gets!

"Be careful, Master Lu Fan, don't let anything else go wrong."

As Lu Fan continued to descend, the situation inside the crack gradually became clearer.

There were many white crystals embedded in the rock wall, which, after careful identification, were confirmed to be saltpeter.

He took out his pickaxe and shovel and began to carefully collect saltpeter.

After collecting each piece of saltpeter, he would carefully inspect the surrounding rock face to ensure safety.

The space inside the crack wasn't large; if Lu Fan moved even slightly, some small stones would fall down.

"Refrigerator, gunpowder, crushed ice, ice cream..." Lu Fan muttered to himself as he collected saltpeter.

During the process of collecting saltpeter, Lu Fan also discovered some peculiar phenomena.

The saltpeter in the crack seemed to be very tightly bonded to the surrounding rocks, and some of it even required a lot of effort to pry it off.

[Wilderness Survival Announcement]

Chinese contestant Lu Fan triggers a 10,000-fold return.

[Miniature Saltpeter Mine*]

"Great! The 10,000x return has been triggered again. Lu Fan is truly amazing."

"Thank you, God Lu Fan, for sending 10,000 saltpeter mines."

"Sometimes having too many supplies isn't necessarily a good thing, don't you agree? @Beautiful Country, @Cherry Blossom Country, @..."

"Haha, you're right. Our country has limited territory and can't support that many supplies."

Gradually, Lu Fan's basket filled with saltpeter, becoming quite heavy.

"That's about enough, it's time to go up."

Lu Fan first tied the basket with a rope, and then he climbed up on it himself.

With his strong physique, Lu Fan braced himself against the stone walls on both sides of the crevice with his hands and feet.

Then, using both hands and feet, they quickly climbed upwards.

Live broadcast room.

"Wow, that's some serious physical fitness."

"A Classic Reenactment: 'I Am a Special Forces Soldier'"

"Oh my, I've seen that episode. That's how the cold wind climbs up the chimney, and it ends up making me catch a cold."

"Haha, you can learn a lot in this live stream even if you do nothing."

"They're all idiots."