The cold wind is howling, large leaves are fluttering and falling with the cold wind, the gorgeous forests, the bushes are yellowing and withering, and the hungry monsters have stepped out of the hunting circle, looking for food and storing food in order to survive the long winter.

"Kill! Vanguard - Eighteen Shots!"

"Needle Rain!"

Gong Boya held a black iron spear, killing all sides in the group of monsters, with short sleeves on the upper body, trousers made of monster skin on the lower body, the tendons and veins of his arms were prominent, wielding a black iron spear, and the vanguard eighteen spears became more and more charming in his hands.

Dressed in a red flower skirt like a smart flame goddess, the long hair that turned into flames rose without wind, and the slender hair turned into fire needles like a rain of fire from the sky, washing away the monsters.

The Yellow Iron Rank Demonic Beasts fell one after another, and finally, it aroused the roar of the Bronze Rank Demonic Beasts, roaring in the sky, and the terrifying air currents shook the surrounding rocks and fragments away, and a strange rune in the void was outlined, and all around, countless heaven and earth desolate qi poured into it.

"Broken barrier!"

With a shout, a cloud of smoke appeared out of thin air, and behind the smoke, a red flash of light cut through the runes, the bronze demonic beast screamed, its body retreated, red blood drifted in the air, and the angry bronze-level demonic beast's tail swept, passed through the smoke, and bombarded the ground, and the smoke behind him turned into Wu Lao holding red again, his eyes were cold.

The injured bronze-level demonic beast suddenly felt the crisis, raised the beast's head, and in the air, countless flame needles circled and flew, under the control of the flame girl, fused, and finally turned into a fireball, which contained the power that made the bronze-level demonic beast tremble.

"Flames—cannons!"

The blazing fireball suddenly turned into a beam of flames, accompanied by a roaring loud sound, and instantly penetrated the body of the bronze-level demonic beast, leaving a long trace of flame bombardment behind it, and the bronze-level demonic beast fell!

"In just a few months, you can actually kill the bronze-level demonic beast and enter the wasteland, young master, is this what you call the martial arts path of the desolate?"

The easy siege of the Yellow Iron Rank Demonic Beast was killed, Wu Lao's eyes looked at the flame girl Nana vaguely and inexplicably, and her heart was hot, Nana is a desolate person, she can achieve the desolate realm, and her grandson Wu Gang can do the same, even if you don't use desolate skills, as long as you can practice martial arts, you can also become a martial arts cultivator!

"Miss, all the monsters have been killed!"

Covered with scars and bloodstains, the original thin male uncle's teeth and completely detached into a warrior, the wound was bitten and infected by the monster into the body, feeling a burst of comfort, the original frightened, avoided the wild qi, now become the best tonic!

The cold winter is coming, the monsters are infested, and the huge body of the Taoyuan RV is often attacked by the monster group, and these monster groups have become, Gong Boya, Nana and Wu Lao's prey, along the way, there is no worry about no monster hunting.

"Collect all the corpses of the demonic beasts, and wait for my brother to extract the ingredients, these are the best resources for refining talent pills, especially the bronze-level demonic beasts, send them over first, my brother said, this is used to make blue-level talent pills!"

Nana's wind was light, and her pure pretty face was sweating slightly, the Yellow Iron Rank Demonic Beast could be used to make talent pills, while the Bronze Rank Demonic Beast could naturally refine the Blue Rank Talent Pill.

Wu Lao's heart moved slightly, he was originally the strongest in his innate rank fivefold desolate people, but now, the young master and Nana have caught up, but the talent pill is ineffective, he can't get through the magic pattern, he can't control the desolate qi, and his strength can't increase, he can't say it's in a hurry, that's a lie, at least, after opening the magic pattern, he can solve the problem of death marks, and he doesn't want to be afraid of death all the time.

Compared with the bloody wind and rain outside the Taoyuan RV, the corpses of the Yellow Iron Rank Demon Beasts killed were all over the place, inside the Taoyuan, Su Fan was carefully refining this, and the charming and moving Qian Yunxian and the maid Ruhua watched curiously on the side.

What Su Fan has to do is very simple, as a scientific research assistant, there is still a chemical reaction at this point, the only thing to worry about is whether the chemical reaction in the previous life is effective in this Kyushu world?

What is done is the saponification reaction of the oil.

Su Fan first dissolved quicklime in water to make lime slurry, and then poured baking soda into it, fortunately, these raw materials were sold in Liujiabao, and Su Fan directly asked people to buy some.

Baking soda, also known as baking soda powder, reacts with lime solution, i.e., calcium hydroxide solution, to form calcium carbonate precipitate and a clear solution on top.

These clear liquids are exactly the sodium hydroxide that Su Fan needs. Sodium hydroxide, commonly known as caustic soda, is an important industrial and chemical raw material with strong corrosiveness.

Pour the skimmed sodium hydroxide solution into the hot oil pan and stir it thoroughly, and the saponification reaction will occur.

The oil pot is not sold, Su Fan directly used the refined iron of the modified Taoyuan RV to build one, not to mention this thing in the dark wasteland of Leizhou, even in the Great Qin Kingdom, fortunately, Su Fan is not particular, there are many monster corpses in the Taoyuan RV, directly refine the monster oil, stir it evenly, and the next thing is to wait.

Su Fan was not idle, and asked the maid to grind the marinade cubes and stir them well with water. The brine block is actually a hard block made by evaporation and curing of salt brine. Lao Baixing collects the brine blocks in the salt pan and transports them to the whole country, and after adding water to dissolve, it is reduced to brine, that is, the brine of "brine point tofu".

I thought that there was no brine in this dark wasteland of Leizhou, but I didn't expect to really underestimate the people of this Kyushu continent, it seems that no matter which world, the salt thing, it really can't be.

Su Fan uses brine, mainly because this kind of thing contains an ingredient that is difficult to synthesize artificially at present, that is, hydrochloric acid.

The three acids refer to sulfuric acid, hydrochloric acid and nitric acid, and the two bases refer to sodium hydroxide and sodium carbonate.

Among them, the two alkalis can be prepared by soil method. However, the preparation of the three strong acids is not so easy, and the easiest way is to use the natural hydrochloric acid in the brine.

At this time, the Warcraft oil in the pot had already begun to react, and the oily yellow soap on the top layer began to solidify gradually.

Su Fan hurriedly picked out the pure, largest part of the soap that had not yet fully solidified, and let it stand, and after this part was solidified, it was soap.

That's right! What Su Fan wants to create is a necessary skill for all traversers - soap!

"Young master, what is this? This is what you call a business opportunity comparable to your thermal insulation workshop?"

Qian Yunxian, who had a bewitching figure, stretched out his hand and held a piece of soap, and it seemed that he could still smell the smell of demonic beasts emanating from the soap between his noses.

"Hehe, Sister Qian, this piece is just an experiment, and some flavors can also extract the essential oils in flowers and fruits in the future, making the soap more aromatic. But now I have limited time, so I can only make a piece and try it!"

"This is an indispensable daily necessities for laundry, bathing, and every family, and its decontamination effect is absolutely good, better than any decontamination effect on the market!"

Just like the thermos water cup and thermos water bottle are sold in the dark wasteland of Leizhou, Su Fan is not worried that there will be no market for soap, the only thing that can be beaten is the price!

"Is this true? Ruhua, you go and try it!"

"Yes, Miss!"

Qian Yunxian saw Su Fan use Warcraft oil and some strange things to make soap like this, and the soap made casually would have a better effect than any soap on the market? Qian Yunxian really didn't believe it.

Hearing the young lady's order, the maid ran out like a flower with a bang, and after a while, a laundry basin came in, and the clothes were stacked inside, and they were washed in front of Su Fan.

"Little,,Miss,,Look, really, it's really cleaned!"

As a maid who washes clothes all year round, Ruhua shouted in surprise, looking at the soap with a look of surprise, and people who have not washed clothes all year round will understand how important a piece of soap is.

"Actually, it's true?"

Qian Yunxian was dumbfounded, and then his face turned red, extremely delicate, how big a market would be for a piece of soap that has stronger decontamination ability and is more convenient to use than the one on the market?

"This is a mountain of gold!"

Compared with the maid Ruhua's surprise about the decontamination effect of soap, Qian Yunxian's surprise about the soap market, Su Fan's heart was even more excited, this is not a small piece of soap, this is a proof that the chemical system in the previous life can be applied to the Kyushu continent!

With this piece of soap as a base, Su Fan is more confident in the following experiments.

"Sister Qian, don't be too excited, the matter is not finished yet"

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