Take a look at the brief description of the branch line, as well as the mission requirements.

Manufacture 10000 sheets of paper, and the specification requirements are at least 10 or more, even if it is valid.

It can be clearly felt that the difficulty of the side quests after entering the Bronze Age has increased.

In the past, one material was enough, but now it requires [-] copies.

However, for something like paper, as long as one can be produced, then [-] sheets are not a problem.

The difficulty lies in the production process.

Many people know that paper is made from trees.

But how to connect trees that look like they can't be beaten together with paper.

This belongs to the wisdom of ancient human beings.

The ancestors of primitive humans in ancient times were counted with straw knots.

A few pigs were caught today, and a few rabbits were caught tomorrow, all of which are clearly arranged for you.

Whoever catches the most will eat the legs.

But with the deepening of the concept of mathematics, ordinary straw knots can no longer meet the needs of human beings for counting.

You say.

Zhang San's father died suddenly, and Zhang San invited all the fallen people to come to the house for a feast to eat the wild boar he caught just yesterday.

However, there are more than 200 people in the whole tribe. It is necessary to ensure that everyone can get the delicious pork, and everyone will enjoy it together, so the wild boar will be divided into more than 200 pieces.

He chopped wild boar more than 100 knives, but was called away because of emergency, so he asked his son Li Si to continue chopping.

When the tribe was just born, human language was not perfect.

Zhang San babbled and pointed to the grass knot on the table, and told his son with body language, your father and I have chopped more than 100 knives, you can count the grass knot and you will know.

So Li Si began to count.

Aw, 108 cuts have been made so far.

After finishing the work, Li Si then chopped, chopped a knife, tied a knot, chopped a knife, and tied a knot again.

He chopped more than 50 knives, and was called away for something, and his wife Wang Wu came to do it.

Wang Wu also had to count the straw knots from the beginning.

Zhang San came back from his work and saw that his daughter-in-law was still counting the straw knots, and the pork had not been chopped, and he was immediately angry.

This is too slow!

Aren't you delaying everyone's dinner?

Just bury it with you!

So Zhang San brought up the sinful kitchen knife, and the icy blade shone with the cold light of impunity.

It can be seen that the straw knot has limitations for human communication.

Even if decimal and hundred-based straw knots appeared later, the efficiency was still very low.

Moreover, just a knot, it is difficult to express a clearer meaning.

So, with the evolution of Ming Dynasty, counting from straw knots was changed to writing simple numerical symbols on the sand.

Handwritten, simple and convenient.

When you have time to tie a knot, someone else has already drawn a "1" in the sand

But soon, with the continuous improvement of human language, more and more symbols were invented, representing many meanings.

With more symbols, some complex patterns will appear.

The primitive ancestors of the family took great pains to draw a twisted pattern.

Suddenly, the wind picked up

This is very embarrassing.

Later, it was changed to engraving and painting on the wall.

That is the origin of frescoes.

Today, murals have become a materialized heritage conservation around the world and are invaluable.

If there are enthusiastic Chinese netizens on the Internet who say to you: You have so many murals.

There is no doubt that it must be a kind of recognition of your wealth and ability by the kind-hearted Chinese people.

The predecessor of paper has gone through five long stages of straw knots, sand, murals, oracle bones and bamboo pieces.

Finally, when people realize that these things are too troublesome to record words.

Paper was born, and the light of auspicious clouds running through ancient and modern appeared grandly.

As early as in ancient China, the concept of paper was proposed by the working people at that time.

Of course, people at that time were still very crude.

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