Bath beans are the earliest detergents to appear, as early as the Wei and Jin dynasties were invented, Sun Simiao's "Qianjin Yaofang" and "Qianjin Yifang" have recorded the production method of bath beans, the pig's pancreas dirty blood washed, tear off the fat and grind it into a paste, then add soybean flour, spices, etc., evenly mixed, after natural drying, it becomes a bath bean that can be used for washing purposes.

Later, people improved the production process of bath beans, added sugar when grinding pig pancreas, replaced soybean flour with soda ash or plant ash, and added molten pig fat, mixed evenly, pressed into a ball or block, this is pancreas!

However, due to the difficulty of obtaining a large number of raw materials such as pig pancreas, both bath beans and pancreas have not been widely popularized, and are only used in a few upper-class wealthy homes.

Yang Su carefully studied the 17th-century encyclopedia of agriculture and handicrafts, and asked Wang Chengen to take the pancreas and confirm it again and again, and finally determined that the pancreas should be similar to the composition of modern soap.

It's just that because of the process problem, the decontamination ability is poorer, and the pancreas is added with a variety of floral products, osmanthus pancreas, rose pancreas...... It is quite similar to today's various soaps with different scents.

This soap can undoubtedly be made, adding spices is soap, adding sulfur is sulfur soap, the original most basic daily necessities, but in this era it is a luxury, complete profiteering.

Yang Su was ready to mass-produce soap, and the soap and pesticidal sulfur soap were sold to the common people at a low price, and the soap continued to be sold as a luxury product.

Yang Su now has 16 points of faint monarch value, plus he has revitalized the factory guard and Yongwei battalion, and finally dares to let go of his hands and feet a little.

"System Elf, I want to buy a copy of "Advanced Experience in Producing Soap and Glycerin by Native Method in 1958"!" Yang Su clicked on the system mall and commanded.

"Master, it costs 2 points to unlock the book, and it costs 1 point to buy a book, 100,000 taels of silver, a total of 100,000 taels of silver, and 3 points for the Dusk, please confirm whether it is a transaction?"

"Confirm purchase!" Yang Su confirmed, looked at the local method of making penicillin, and asked, "How is the price of the book calculated?" ”

"According to the value of the content of the book and the technology contained in the book, how many years beyond the current era!" The system wizard explained.

Yang Su held the book of making soap and glycerin by the soil method, and reluctantly took his eyes off the book on making penicillin by the soil method, it was too expensive to unlock it and required twenty faint points, and Yang Su could not save the faint value for penicillin.

"Buy 20,000 pieces of plate armor and steel helmets!" Yang Su is now rich and buys ordnance on a large scale, but he did not buy the spear weighing 56 catties again this time, the spear was specially prepared by Yang Su for Qin Liangyu's white pole soldiers, although the forbidden army is now commanded by famous generals such as Huang Degong, but in Yang Su's heart, it is always one percent worse.

Yang Su did not have the concerns of those emperors that they must frantically arm the forbidden army and gather hundreds of thousands of troops in the capital to ensure the superiority of troops.

The three major battalions in the capital have proved with ironclad evidence that they have completely decayed, and the forbidden army is not much better, even with the support of Yang Su and the assistance of Huang Degong, it is not possible to change the forbidden army in a short time.

And the spear can only be used by martial artists in the realm of practicing tendons, and now the forbidden army can't form a spear team, and the spear can't exert its power if it can't form a formation, so it's better to use firearms.

"20,000 pieces of plate armor cost 400,000 taels of silver, and the faint monarch is worth 4 points, and the steel helmet costs 40,000 silver taels and is worth 2 points, and the total cost is 440,000 taels of silver, and the faint monarch is worth 6 points, please confirm whether it is a transaction?"

"Confirm the transaction and ship directly to the bank!" Yang Su waved his hand and confirmed.

The vault has always been heavily guarded by guards, and it is not usually opened. Nowadays, Yang Su's will is needed to open the silver vault, so Yang Su is not afraid that the system delivery will be seen. As long as no one sees with their own eyes how those things came from, no one will dare to suspect Yang Su, and will only think that this is the hidden force behind the emperor.

Revolvers are something that has long been eliminated by automatic pistols, and compared with automatic pistols, they have a low rate of fire, a slower reload, and a smaller ammunition capacity.

However, because the revolver was very simple to deal with blind fire bullets and had reliable performance, it was chosen by Yang Su. The defects of the revolver are nothing to Yang Su, he bought the revolver completely to use it as the last weapon, just like a crossbow, there is only one crossbow arrow, not to pursue how powerful it is, the most important thing is reliability! At the critical moment, that one crossbow arrow can decide life and death!

The Colt Python type revolver is known as one of the best in the world, produced in 1955. And its price was cheaper than the 1895 barge gun, which naturally entered Yang Su's eyelids.

"The system elf helped me unlock the Colt Python revolver, and then buy 20 to see how much I have left?" Yang Su asked.

"It costs 4 points to unlock the revolver, 200,000 taels of silver to buy twenty, and 2 points of stun value. It costs a total of 200,000 taels of silver, and 6 points are worth it. ”

"So I have 1 point left? How many bullets can I buy? ”

"You can buy 10,000 rounds of ammunition. It costs 10,000 taels of silver! ”

"Buy 10,000 rounds of ammunition!" Yang Su decided without distress.

How can you be reluctant to spend this little money, one or two silver and a bullet is indeed quite expensive, but if Yang Su is willing to sell this revolver, then even if it is hundreds of thousands of taels, there are people vying to buy it.

The power of a rune treasure in the realm of returning to the void realm is almost similar to that of this pistol, but it is far less concealed and fast than this pistol, and it is often fried to a million silver taels, and the price is not marketable!

And if this pistol is fired at close range, even if the monk is caught off guard, he may be destroyed by the body, it can be seen that as long as Yang Suken resells it with the help of the system mall, it is still very easy to make money, of course, this is not the value of the faint monarch!

"Cheng'en, you come in!" Yang Su played with the revolver, the surface of the pistol was excellent, showing a dark blue light with a little light purple, which was as smooth as a mirror, which made him a little in love.

Wang Chengen saw that Yang Su was playing with something similar to a handcuff, so he didn't dare to disturb, and quietly walked to Yang Su's side and stood aside.

"Let's go out with me and try out the gun!" Yang Su took the revolver, took out two more bullets, stood up and walked outside the hall.