When I woke up the next day, the sun had already risen from the east.

The not-so-bright, sallow little face was comparable to the dreamy Han Cheng.

However, the temperature is quite high, at least seven or eight degrees higher than yesterday.

By noon, it was already warm outside.

Some elderly people who were afraid of the cold came out of their rooms, squatted against the wall, mended their shoes, and basked in the sun.

Some strong people even took off their thick fur coats.

Some women in the tribe took this opportunity to boil hot water and give baths to the minors in the tribe.

Because the temperature is relatively high, you don’t even need to go to the bathhouse.

At such a temperature, the surrounding snow was melting rapidly. By 10 p.m., it had become much thinner, and the dead grass that had been covering it had already been exposed in some places.

At this rate, it would only take three days at most for the snow to melt completely, and the spring plowing in the tribe could then begin.

In the tribe, Shitou seemed a little excited as he picked up a stone pencil, drew a line on the simple calendar he made, and carved some words underneath.

He was certainly excited, for during this winter he had thought of a way that might make the bark softer and easier to break.

As a result, due to the cold weather, it has not been possible to carry out the plan until now.

Now that the weather was finally starting to warm up, it wouldn't be long before he could start testing his ideas and making better paper.

It wasn't just the Qingque tribe that was excited about the warming weather. All the surrounding tribes that felt the warmth became excited.

They don't have much food left, and some of it is almost gone. Now that the weather is starting to get warmer, it is undoubtedly great news for them.

Some people in some tribes that were short of food took this opportunity to go out and search for food.

In winter, birds and small animals sometimes die of hunger and cold.

When the snow melts, these things covered by the snow will be exposed and become food for hungry people.

Han Cheng, who was happy basking in the sun for a while, frowned because he suddenly remembered the knowledge about cold fronts and warm fronts that he had learned in high school geography.

Before the cold front passes, a warm air mass will cover the earth and the temperature will rise.

After the warm air mass passes, the cold air mass will move in, pushing the warm air forward.

When cold and warm air currents pass through the intersection, strong winds, rain and snow will occur. When the cold air mass behind passes, the sky will clear up, but the temperature will drop a lot and become extremely cold. When encountering some extreme weather, cold waves can also form.

But I hope there isn't a cold front passing through.

Han Cheng thought this in his heart after thinking about the knowledge that he no longer remembered clearly.

Delaying the spring ploughing for a few days was no big deal. What worried him most was the outbound trade teams.

When a cold front passes through, they will have to suffer a lot.

And judging by the rising temperature today, this mass of warm air must be quite large, and the cold air that can push such a warm air flow must naturally not be small.

After the weather warms up, a sudden cold snap comes, which is really a bummer.

Thinking about these things in his mind, the first thing Han Cheng did after waking up the next day was to feel the temperature.

The temperature hasn't changed much from yesterday, it's still very warm.

Could it be that I was wrong?

After standing here for a while and feeling the situation, Han Cheng muttered to himself.

I wish I was wrong, then I wouldn't have to suffer so much.

Han Cheng picked up the sleeping little pea, teased him for a while, then carried him out of the room.

The ground is a bit soft and there was basically no ice last night.

Carrying the little guy, I walked into the cave used as a canteen, where the hardworking Huo Er was making a fire.

When the weather is cold, sitting in front of the stove and burning a fire is a more attractive thing.

If you can bury two sweet potatoes in the fire, or put a piece of cold steamed bun from home on a stick, then the act of making fire will become more attractive.

But this morning was an exception. In addition to Huo Er who was burning a fire, Shi Tou was also squatting next to another wood stove burning a fire not far away.

What is this guy doing here burning a fire today?

What's cooking in the vat?

Han Cheng walked over with Little Pea in his arms, looking puzzled. He leaned to one side, moving Little Pea aside, and with his other hand, he grabbed the lid of the pot and lifted it up with force.

After the white mist rose, the scene inside came into Han Cheng's sight.

Bark?

Han Cheng's eyes widened.

What is cooked in this stone stove is not food, but tree bark.

What is this guy doing, boiling tree bark? Is he trying to recall the good old days and drink a bowl of tree bark soup in the morning?

Han Cheng looked confused.

Only after seeing that the bark being cooked inside was the peeled outer layer did he suddenly understand.

It turns out this guy was fiddling with papermaking.

But when making paper, is it necessary to boil the fermented bark in water?

Han Cheng really didn't know this, but it was always good to be brave enough to try new methods.

Because many new things are discovered through repeated attempts.

Moreover, Han Cheng really didn't know much about papermaking. The papermaking process he had developed before was very simple and had a lot of room for improvement.

Putting the lid back on, Han Cheng began to talk to the stone, talking about papermaking.

After studying this for several months, I have gained a lot of insights on paper, compared to the extremely difficult flying technique.

He felt that the paper made before was too thick and too hard. On the one hand, too much pulp was used during papermaking, and on the other hand, the pulp itself was too hard and too rough.

So he started thinking about how to make the pulp softer.

After trying several methods, Shitou came up with the idea of ​​"boiling".

Because foods like hard-to-chew raw meat and hard-to-teeth soybeans will become soft after being boiled in a large vat and using water, Shi Tou wants to try this.

After listening to what Shi Tou said, Han Cheng couldn't help but nodded, thinking it made sense. It seemed that it was a wise decision to let Shi Tou do this matter before.

For fear that the bark would not be cooked thoroughly, the stones were boiled for a long time.

Shi Tou didn't stop firing until breakfast was ready and everyone had finished their breakfast for a while.

After simmering for a while with the lid on, open the lid and take out the bark inside.

After soaking in warm water for a while, place it on a chopping board and cut it finely with a copper knife.

After cutting, they put it into the stone mortar and started pounding it. Han Cheng watched from the side, wanting to see if it would work this time.