The next day, in the morning.

Ling Hao was eating the cage cake while checking if there was anything useful in the Dao Tool that the contract shop had refreshed today.

Huh, the items that came out today look good.

Except for a literary masterpiece that could not be shaken, his eyes were mainly focused on the latter two technologies.

Papermaking and crossbow making techniques!

Both of these are good things.

Not to mention anything else, just mastering the art of papermaking is enough to be proud of the world.

He's had enough of living without paper last night...... After all, this is the Warring States Period, how can there be high-tech products such as toilet paper, cotton paper, wet wipes and so on?

I am a noble family in Yongcheng, but there is no toilet paper when I go to the toilet...... I can only barely deal with it with a toilet chip.

The so-called toilet chip is a small wooden stick, which at first glance looks a bit like the small chopsticks of later generations, and uses this small chopsticks to wipe the buttocks...... As you can imagine, my ass still hurts a little now.

And this thing can't be reused yet, it's a one-time consumable...... When you run out, you have to make it again.

Ling Hao suddenly felt a little sympathetic to the female compatriots in this world, and the old men who were born in the nobility could only solve it in this way, those women ...... I'm afraid that I may not be able to have such economic conditions of my own.

The common people and slaves did not have such a strong economic capital as themselves...... They can probably only ...... The picture is too beautiful to continue imagining.

The living environment in this era is good, and the air is so clean that I almost faint...... But in terms of the cultivation of personal hygiene habits, Ling Hao could almost figure out the difference between nobles and commoners with his toes.

It is no wonder that the ancient families never saw the common people in general, they only thought that these people were idiots, because in their eyes, the common people were representatives of "no culture, no ambition, and no quality".

Another point is probably the reason why the world still uses bamboo slips.

Bamboo slips have a long history in ancient times, it is a very important writing material, before the advent of paper, the upper level of negotiations, government decrees are almost all written using bamboo slips.

Of course, in addition to bamboo slips, it is not that there are no other writing materials, but silk is expensive, and the family can never afford to consume it without mines.

I still remember that in the previous little story, Dongfang Shuo wrote an article to dedicate to Emperor Wu of the Han Dynasty, with a total of more than 3,000 pieces of bamboo slips, which were carried into the palace by two strong warriors, and Emperor Wu of the Han Dynasty read it for two months before reading it......

This means that the consumption of bamboo in this world must remain at a rather terrifying value.

Ling Hao looked back thoughtfully at the large bamboo forest in his backyard...... I have mixed tastes in my heart, and now I finally know what the ancients planted this thing for.

Besides, not only does the bamboo slips have to consume a huge amount of money, but also they have to be time-consuming and laborious to string the bamboo slips together with hemp rope and tie them together, which can be regarded as a formal document, and at the same time, its weight is also quite amazing, just moving a bundle of bamboo slips from the left hand side to the right hand side is very laborious...... After a long time, it may also induce arthritis or something.

Speaking of which, I have to admire Qin Shi Huang Qin Da's terrifying arm strength for decades, uh...... There is also his terrifying workload, it is said that the bamboo slips he has to review every day weigh two hundred catties, and he will never sleep until he finishes the approval, which is a long time...... Who can stand it?

By the way, I would like to thank Cai Lun for improving papermaking technology and greatly reducing the cost of papermaking, which has led to the situation that everyone in later generations has paper.

It seems that the research and development of papermaking technology has to be put on the agenda...... Well, of course, Ling Hao wouldn't tell others that it was because he couldn't stand the pain of going to the toilet and running out of paper......

Another prop, the theory book of repeater crossbow production technology, this is the military equipment that will shine in the arms race with the Six Nations in the future, because of it, the heavy infantry was completely kicked out of the military and political arena, because of it, it aroused the deep jealousy of the Six Nations, because of it, the black technology group in China has the continuous firing technology......

Of course, the role of the crossbow is not as exaggerated as the range and power of the later networks, and its main role is actually to penetrate the enemy's heavy armor to achieve the military purpose of killing and blocking the enemy's rapid advance to their own troops.

Another reason is that the training cycle of archers and crossbowmen is completely one heaven and one underground, and a skilled archer needs about three years of training before he can set foot on the battlefield, while a crossbowman only needs to be trained for three days to be "certified to work......

Let's take a look at the comparison of the combat effectiveness of crossbowmen, a skilled archer can probably shoot five to six arrows in a minute, while a trained crossbowman can only shoot two or three arrows in a minute, although the attack speed is only about half of the bow and arrow, but the emergence of the crossbowman military profession also marks the discovery and improvement of the technology points of continuous arrows......

Immediately afterwards, a crossbow that can fire several arrows in a row appeared on the battlefield, and whether it is an arrow, the transformation of arrows, the power and range are constantly improving, with the assembly line production process of the Qin State, the war machine of the Qin State can crush the six countries so quickly and realize the great ambition of unifying the world.

In the Han Dynasty, the crossbow and arrow technology was further expanded, and it was discovered by chance that copper could be made to make the range of the crossbow more accurate, and in the Three Kingdoms era, Zhuge Liang improved the crossbow technology with the assistance of his wife Huang Yueying, and successfully manufactured a crossbow that could fire ten arrows at a time, which is the origin of the "Zhuge repeater" that later generations talked about.

Therefore, a seemingly simple and small change after the change of thinking has a huge impact on technology production and R&D.

Science and technology are the primary productive forces, and the old man does not deceive me.

Soon, Ling Hao exchanged these two items for the price of ten gold.

This is the gold of the Warring States period, and the price assessed by the contract store is already very cheap.

After eating the cage cake, Ling Hao perked up: "Okay, let's start work." ”

"Childe, no......! Not only did Ji Qing not die, but he was also rescued by the merchant, and now he is on his way to Yongcheng!" Wang Xuanqing frowned and suddenly rushed in.

"Oh, just in time, I was thinking to meet him, Miss Xuanqing, pack up, and we'll leave at once." ”

"Where is Childe going?"

"Hmm...... Let's go to the post station I passed by yesterday, I think they should be there soon, it's not far from Yongcheng, if there is an accident, they can come back quickly. Ling Hao said after pondering for a while.

"Yes, I will obey my son's orders. Wang Xuanqing said yes, and then stopped saying nothing and walked out of the room.

"It seems...... The plot has to continue, so should I have a showdown with him?" Ling Hao thought thoughtfully, and there was a little more undetectable coldness in his eyes.