Crossing over reveals a waste's difficult journey home

You don’t know until you see the list given by the system. Jiang Tuan realized that he had brought so many new things to Daxia without realizing it.

Soy products, stone mills, stone rollers, crude salt extraction, kangs, underwear, tables and chairs, slides, saddles, stirrups, horseshoes, double skin milk, ginger milk, as well as the old noodles and steamed buns that were just made today.

Soy products, horseshoes and the like are systematically listed, there is no problem with that. Double skin milk and ginger milk enriched the ancients’ dining tables, he can understand that, but underwear... does it count as well?

Okay, let's just go with it. Even though it looks a bit weird, he can accept anything as long as there's energy involved.

Because it involves many aspects, the data on the list given by the system is very complicated. If you look at it one by one, it will probably take a long time.

Such a large amount of complex data was a daunting challenge for Jiang Tuan, who was too lazy to even read the instruction manual.

He was too lazy to look at it carefully, so he just glanced at it and jumped to the end, because the system gave a total amount of energy collected at the end.

It is enough to know the total number. As for how much energy each thing can obtain, he will not look at it carefully. Anyway, he is now a partner of the system and it should not cheat him.

However, after seeing the last number, he frowned.

He didn't think 251 was too much, and he didn't think 249 was too little, so why did he choose 250? Was it because even the numbers were laughing at his stupidity?

Trying his best not to focus on that unpleasant number, he continued to ask the system: "If 2.777 energy can be exchanged for a map, then more than energy can be exchanged for more things, right?"

"Dear, yes."

As it spoke, the system gave out another list. This time, the system listed all the knowledge that had an exchange energy within 250, and very considerately marked the required energy behind each piece of knowledge.

The list included recipes for many things including farm tools, food, weapons, etc., but Jiang Tuan couldn't think of anything that was missing from the system.

Looking at so many things, Jiang Tuan was almost having difficulty making decisions.

If he had enough energy, he would definitely exchange them all at once. Then he could just throw these things directly to Jiang Qi and not have to worry about anything. He could just sit back and wait to collect the energy.

Unfortunately, he doesn’t have enough energy now. What he needs to do is to use his limited energy to exchange for the most useful thing for Daxia at the moment.

After looking at it for a long time, he felt that this was useful and that was useful, and he had no idea how to choose. Finally, he decisively asked the system for help.

"System, I can't choose, do you have any good suggestions?"

"Dear, the system recommends that you choose 'Ancient Steel Smelting Technology' and 'Gunpowder Production Method'."

After the system finished speaking, Jiang Tuan began to look for it in the list.

After finding it, he discovered that the energy required to exchange for 'Ancient Steel Smelting Technology' was 125, and the energy required to exchange for 'Gunpowder Production Method' was also 125, not more, not less, adding up to exactly 250.

From the novice gift pack which included soy products and crude salt extract, and the fact that 2.777 energy could be exchanged for a Huns map, Jiang Tuan could see that energy was very valuable in the system. He thought that 250 energy could be exchanged for a lot of knowledge.

Now, after a closer look, he can only change to two types, which is a bit far from his psychological expectations.

"System, there is no problem exchanging these two pieces of knowledge, but why does it cost so much energy? We have worked so hard to collect so much energy, and if we exchange it, it will be gone again. Can't it be cheaper?"

"Dear, it can't be cheap, this is programmed!"

Jiang Tuan originally wanted to bargain with the system, trying to save as much as possible, but when the system said it was pre-programmed, he knew his approach was useless.

This made him somewhat resentful towards the master of the system. Since he was determined to help Da Xia, why were there so many restrictions?

But after complaining, he knew without the system telling him that he was stupid again. It was not that the owner of the system did not want to help Da Xia, nor was it that the system was unwilling to exchange things.

It’s all because of lack of energy. Without energy the system can’t produce anything.

"Fine!"

Perhaps sensing Jiang Tuan’s helplessness, the system gave a considerate explanation.

"Dear, for the ancient world of Daxia, knowledge of steel and gunpowder plays a huge role, and it does take a lot of energy to exchange them.

Besides, these two things are very important for resisting the Huns!"

Jiang Tuan understood the system's reasoning. Both steel and gunpowder were powerful weapons for Daxia.

If Daxia had sharp weapons and strong armor, and with proper command, it would definitely have the upper hand when fighting against the Huns.

If Daxia had gunpowder, it would not have to send so many troops when going to war. It could just bury some gunpowder wherever the Huns passed. Even if it didn't kill many people, it would at least scare the Huns, who had never seen gunpowder, half to death.

After thinking about it for a while, he calmed down and decided not to worry about the energy anymore and followed the system's advice to exchange these two kinds of knowledge.

After the change, he thought that the two kinds of knowledge given by the system would be the same as the previous Hun map, rough and simple. However, when the system gave him two thick things, he realized that he had misunderstood it.

“Are there so many systems?”

"Dear, you get what you want in exchange for your energy. The system won't lie to you!"

This is true. The things exchanged for 2.777 energy are definitely different from those exchanged for 250 energy.

Jiang Tuan first opened it in his mind and looked at it. The more he looked at it, the more satisfied he became.

The system is very considerate, and the knowledge provided is based on Daxia's existing social level. It may take some time to implement, but it will definitely make it possible for people to do it.

What made him even happier was that there were not many academic terms used in the knowledge, and it was all written according to the content that the people of Daxia could know or understand.

He knew that the names of many things in Daxia were different from those in the modern world, and there were some that he himself could not match up. If the knowledge given by the system was too academic, he and the people of Daxia would not be able to match them up, and the things might not be made in the end.

While feeling satisfied, Jiang Tuan had a feeling that the system was different from before.

In the past, the system had almost the final say on what to change without asking for his opinion, and after making a decision, it would not explain to him why it did so.

Now, everything that is exchanged in the system will be listed in detail for him, and any decision will be explained to him.

Although he may not read the lists, and may not understand some of the explanations, but it makes a huge difference to him whether there are lists or explanations.

He did not ask the system to treat him in every way possible like it treated its master. As long as the system had the most basic respect for him and regarded helping Daxia and saving energy to return home as the most important things, that would be enough.