The Qingque tribe has no shortage of things like tree bark.

Land reclamation is an ongoing activity in the tribe, and many trees have been cut down.

Some of these trees that were more suitable were left as building materials, while those that could not be used were burned into charcoal.

With the refining of copper, the tribe's demand for carbon suddenly increased.

The spent carbon is used to fertilize the fields.

The remaining small branches and leaves were collected and used as firewood, which can be said to be fully utilized.

However, nowadays, these trees have their "clothes" stripped off before being used for various purposes, and the culprit is Han Cheng.

The people in the tribe have always been very active in doing what the Son of God has ordered them to do. Most of them do not ask why, but only ask how to do it.

“Crash!”

A bundle of bark tied with vines was thrown into the tribe's hemp pit, causing a splash of water.

“Crash, crash…”

The sound continued, and several more bundles of bark were thrown into the hemp pit.

Han Cheng still knew the first step of papermaking. Just like retting hemp, it required using microorganisms in the water to remove some things on the bark, leaving only the fibers.

This step is also a major source of wastewater in paper mills.

However, wastewater is not a big problem for the Qingque tribe, because with the continuous reclamation of land, the fertilizer in the tribe can no longer keep up.

Under such circumstances, Han Chengdu would never think that there was too much wastewater from retting hemp and bark.

Fermenting tree bark is a time-consuming task, so after throwing the bark into the puddle, Han Cheng had free time to do other things.

At this moment, he was thinking about what the rectangular object that the person in the picture was carrying to dry was.

Judging from the picture, it should be a key tool in making paper.

After thinking for a long time, Han Cheng couldn't figure out the reason, so he walked out of the tribe and headed west.

When you can't think clearly about some things, you can change your mood and clear your mind.

For Han Cheng, the best way to wake up is to go to the fields, pull some weeds, and fertilize the crops or vegetables. Such things always calm him down.

This may be related to his racial talent for growing vegetables.

The millet was green and was about to ear. The beans on the two acres were as tall as his calves. Han Cheng took a look and did not find any bean worms under the bean leaves. These worms looked ugly but could be sold at a very high price.

What attracts Han Cheng's attention most now is no longer the bean field and the millet field, but the piece of land next to the vegetable field where all kinds of crops grow.

Because this land will give you some surprises from time to time.

Han Cheng squatted down and pinched the rhizome of a short plant from the land.

At first glance, the leaves of this plant look a bit like sweet potato leaves, but upon closer inspection, you will find that they are very different from sweet potato leaves.

If you put it to your nose and smell it, a fishy smell will come to your nose.

That’s right, this plant is Houttuynia cordata, and it is one of the surprises Han Cheng found in this messy vegetation.

Although Houttuynia cordata may not smell very good, it is actually a rare food ingredient.

When spring comes, the Houttuynia cordata that has been dormant for a whole winter will emerge from the ground, looking tender and red.

At this time, pick some tender shoots of Houttuynia cordata, blanch them in boiling water, and then cool them down. They are really a rare delicacy.

Houttuynia cordata is not only delicious, but also a very good medicinal material. Han Cheng does not know its other effects, but there is one that he remembers very clearly, which is to cure cough.

When I was a child, there was a patch of Houttuynia cordata next to my home vegetable garden. When I had a cough, I would pinch a handful, wash it, put it in a pot, boil two bowls of water, and drink it, and the cough would be cured.

In fact, compared to Houttuynia cordata, Han Cheng would rather this thing be sweet potato.

After all, sweet potatoes are a very high-yield crop and their requirements for land are not very high.

It is also easy to eat. You can dig it out of the soil, wash it and eat it raw, or boil or steam it in water. It is very convenient.

Unlike beans, millet, rice, and wheat, there are many complicated and tiring procedures from harvesting to eating.

After being cut and dried into sweet potato chips, they can be stored for a longer time.

However, Han Cheng could only think about such a good thing in his mind. After all, sweet potatoes are not grown locally. If he wants to get this crop, he needs to take a boat across the ocean and go into the tropical rainforest.

Thinking back to the appearance of his tribe's canoe, Han Cheng felt that it would be better for him to give up the idea.

It's not impossible to get sweet potatoes.

Han Cheng suddenly remembered one thing, that is, he still couldn't be sure of the exact location of his tribe. If he traveled through time this time not to the earth but to another world, it would not be impossible to get sweet potatoes.

After thinking about it for a while, the figure of the national treasure that he had seen in the bamboo forest near Lu River appeared in Han Cheng's mind, breaking his wild thoughts.

With this kind of guy around, the possibility that the place where I am now is a foreign continent is not very high.

Han Cheng shifted his gaze away from Houttuynia cordata, stood up and walked towards another place. He didn't walk too far before he stopped. There grew another kind of surprise he discovered.

The surprise is radish!

It has purple-red stems and green leaves with some fine hairs on them. They feel a bit prickly to the touch. It looks very similar to the radish leaves of later generations.

By now, Han Cheng was actually able to confirm that this thing was a radish, because not long ago he had pulled one up and took a bite of the rhizome that was the size of the belly of his little finger.

It has the familiar radish flavor, but the texture is far inferior to the radishes of later generations. It has less juice and meat, and is not very crispy. There are a lot of "tendons" inside, and it is a bit sticky when eaten.

Moreover, the leaves of these radishes now look extremely lush, but the radishes underneath do not grow large.

But as thin as a finger, it is already showing signs of blooming.

If Han Cheng wanted to get the kind of radish that people would grow in later generations, he would undoubtedly need to cultivate it carefully year after year.

But anyway, it's a good thing.

People's emotions are easily affected by external things. Take Han Cheng for example. He felt dizzy because of making paper. But after being stimulated by Houttuynia cordata and radish, he quickly felt better.

Then he started thinking about papermaking again...

Five days later, Han Cheng pulled out a bundle of bark from the hemp pit.

The bark was not fermented very well, but he still insisted on making it. After all, he didn't know much about papermaking and needed to learn it by trial and error.

The optimal degree of fermentation of the bark for papermaking requires repeated trials.

(My favorite book is "I Became Qin Qiong", a book written at the end of the Sui Dynasty. The writing style is relatively relaxed. Interested readers can go and have a look.) Fupin Chinese