The problem that every traverser has to consider is to make money, money is not omnipotent, no money is absolutely impossible, in order to change something, money will make it a lot easier for him. Pen "Fun" Pavilion www.biquge.info

In the whole history of traveling, there is not a single traveler who does not think about making money, if not making money, it needs to be some general equivalent.

Among the many historical travel texts, the reader summarized the three magic weapons of the time-traveler, gunpowder, soap and glass.

When Zhao Xin was reading the book, he still felt the dog's blood, yes, he chose these three, but when it was really time for him to cross, he could only choose from these three.

Gunpowder represents weapons, the use of gunpowder is completely different from the use of cold weapons, soap is a general public product, as for glass, initially a luxury, and finally returned to normal, glass has improved in many aspects.

After Zhao Xin entered Nanle, he began to consider the issue of entry point, the three magic weapons of the traverser are all good entry points, but in combination with his situation, he must make a choice, not all of them.

The gunpowder was removed first, and with the longbowman as the main weapon of the current start, the gunpowder could be put away.

The initial black powder, its power is not satisfactory, even if the premise of achieving the best proportion, to blow up a city wall, it also needs thousands of kilograms, a huge coffin, must be placed under the city wall, sealed, must dig a tunnel to the bottom of the city wall, can come in handy.

Siege factors aside, other gunpowder-based weapons were at best intimidating, and it wasn't until the advent of arquebuses that thermal weapons had the possibility of replacing bows and arrows.

That's right, it's just a possibility, at the beginning of the birth of the arquebus, his firing range was only about sixty or seventy meters, and even the arquebus's rate of fire was not fast, that is, it was easy to train and had good sustained combat ability, which was left behind, and in terms of regional combat performance and explosiveness, it was far inferior to the bow and crossbow.

Not to mention the difficulty of manufacturing arquebuses, in the eyes of later generations, very simple arquebuses, the requirements for steel are still quite high, at least iron is not good, the need is steel, the entire Northern Song Dynasty does not have much steel, steel can not be placed on the standard weapons, can only be used for the forging of high-end weapons, large-scale manufacturing of arquebuses is almost impossible.

Like the longbow, the arquebus is also a weapon of quantity, a single arquebus, his attack power is not as great as imagined, Zhao Xin is preparing to defend the city, the fortress is the biggest reliance, under the premise that it is not possible to make a large number of arquebuses, the gunpowder weapon is less can not play much effect, at most it is an explosive bag.

The explosives package of perfect black powder can also play a role, taking 5 kilograms as an example, it can still make the surrounding three or four meters in the middle of the huge destructive force, but a small amount of use is okay, if more, it will affect the stability of the fortress.

The power of the explosives pack is facing in all directions, and the foundation stone under the city wall will also be affected, and if the opponent attacks all the time, it will inevitably affect part of the foundation.

Besides, gunpowder is not so easy to get, sulfur is available, the price is not low, and miscanthus can also become a substitute for nitrate through conversion, but to have a suitable ratio, it takes countless experiments, charcoal is the same, the black powder that comes out, the power can only be regarded as unsatisfactory, such an efficiency, not even as good as the longbowman, temporarily abandoned.

Thermal weapons are definitely going to be developed, but there is a premise, a huge force and a stable base, this thing is a Pandora's treasure box, once leaked out, it is a double-edged sword.

Glass is not good, after the completion of the production of sulfuric acid, the three acids and two alkalis have actually opened the door, with the help of this card system to identify these natural organic salts, these can be used as one of the materials for making glass, the most important raw materials for making glass are quartz sand, soda ash, feldspar and limestone.

These four are common minerals in nature, compared with the other three, soda ash is much less, but the emergence of sulfuric acid and some inorganic salts makes the manufacture of soda ash not very difficult, at most it takes a little effort.

In addition to soda ash, these other materials are common, not only the card system is above, there are also a large number of sales in Baozhou, as long as these are obtained, soda ash is manufactured, there is no problem with the manufacture of glass, a little experiment, you can make glass, but to make glass, does not mean that you can sell for money.

Glass is a colorless and transparent product after calcination, there are many components of glass, and even different kinds of glass, the characteristics are not the same, but if glass wants to sell for money, it is either made into a mirror, that thing, even in later generations, is also the most expensive kind of glass, a large dressing mirror, but dozens or even hundreds, but ordinary glass, may be a few dollars, more than a dozen dollars, the difference in the middle is almost ten times.

Silver mirror reaction this term, Zhao Xin has heard of it, how to do it, I don't know, it seems to be a silver-plated process, even if this thing has a direction, it needs constant experiments, with countless failures, and finally succeeded, at the beginning the mirror is always ethereal.

As for ordinary glassware, this is a direction, glass in later generations, the most expensive, in fact, is glass crafts, real glass crafts, beautiful, added to some of the creativity of the manufacturing master, their price, will be too high to be affordable, but this requires unique artistic cells.

In the early days of glass, the appearance will definitely not be particularly good-looking, at most it is just a hunt, such a hunt, that is, the hobby of some rich people, with Zhao Xin's current situation, this cannot support the huge expenses.

Whether it is glass or mirror, it is not the initial choice, this thing is too expensive, too eye-catching, such a completely independent business, the profits generated are amazing, it is easy to be targeted by the people behind the scenes, and eventually close down.

Zhao Xin had carefully considered it before, the profiteering items were almost denied, too eye-catching, and easy to target, let alone close to ordinary people, let alone find out the news, and even the profiteering business may not be the most profitable business.

For example, many industries are very expensive and have high profit margins, but they are not as good as some necessities, such as the beverage industry, which is actually the largest and has the highest net profit, which is the water industry.

Pure water looks at things for one or two dollars, but it has created a market of billions, or even tens of billions, for the simple reason that the scale is large.

High-priced luxury water or drinks, how much can he sell, in the whole world, ordinary people will always occupy the vast majority, a bottle of water is often more than ten yuan, or even hundreds of yuan, it sounds good, ordinary people can afford water, but one yuan a bottle of ordinary pure water, everyone has to drink dozens of bottles every year, this is a huge market of tens of billions

From this aspect, there are very few, gunpowder and glass among the three major weapons can be vetoed, then soap, this can be had, a little profit, sell a little more, or the necessities of life.

Zhao Xin's previous choice is soap, glass can be tried, directly take the cheap route, with glass products to occupy the market, after this rollout, it is also a huge market.

To put it bluntly, soap is a reaction between strong alkali and oil, the saponification substance, and the saponification substance is soap, which needs relatively pure oil, soybean oil, animal oil, and strong alkali can use caustic soda, the whole reaction is a little dangerous, with Zhao Xin's body, it is really difficult to control this reaction, especially in the future to expand production, there will be some problems.

But at this moment, Zhao Xin has no choice, the soap must be turned on, maybe after the initial experiment, he can find some ways to reduce his workload in the future, he just needs to master the formula and caustic soda.

This is the only way, compared to the sulfuric acid that is relatively easy to appear, caustic soda seems to have no existence in Chinese history, but to a certain extent, caustic soda is relatively easy to make, and many everyday things can be made into rockets, such as plant ash.

The first time to manufacture, or one of the three magic weapons of soap, even if Zhao Xin knows, the soap saponification reaction, is just a very simple reaction, as long as you grasp the degree, slowly add caustic soda in the oil, and slightly heat it, a certain time, you can get soap, and then use a special mold, the soap that has not yet condensed into the mold, it is completed the production of this soap, but the first time, you still have to think twice.