In early August, Xiang Chunhua was ready to go back after playing in Beijing for less than a month. Zhang Hulan bought a lot of things for Xiang Chunhua to take back.

Now is the hottest time of the year. Zhang Hulan told Xiang Chunhua that next time she comes to Beijing, she should either come in spring or autumn, and not come in summer.

Xiang Chunhua hugged Zhang Hulan and said, "Sister, you must take good care of yourself in Beijing."

"Okay, I'm an adult now, can't I take care of myself? You can leave now, I will go back to celebrate the New Year at the end of the year."

After seeing off Chunhua, Zhang Hulan continued to busy herself with village affairs.

The bitter melon, tomatoes and peppers she planted all grew well, but she didn't eat any of them and saved them all for seeds.

All the peppers are the kind of chili peppers. After they turn red, they are dried and the stems are taken out. The pepper skins are taken to the hot pot restaurant. Zhang Hulan plans to bring some back to Daping Village when she returns to the end of the year.

The potatoes she grew were not very good.

Due to the variety and the fact that they were planted late, the plants were very small and many of them died.

It will be ready for digging in about a month. From the more than one acre of land planted, we will probably be able to harvest a few sacks.

In fact, very small potatoes are especially delicious when boiled in water, peeled, fried in oil until golden brown, and sprinkled with chili powder.

She also wants to bring some back when she goes back, and she wants to take all the good things home.

Zhang Hulan was walking on the edge of the field wearing a straw hat, and Xie Xiaoman was following her wearing a straw hat as well.

Xie Xiaoman also admired Zhang Hulan and felt that she seemed to know everything.

Xie Xiaoman said, "Sir, can the hybrid rice you are making really produce 700 to 800 kilograms per mu in the future?"

"It's hard to say. If the seeds we cultivate are good, it's possible to produce over a thousand kilograms per mu."

"If you can really harvest 1,000 catties of rice from one acre, then your contribution is huge. I heard that under normal circumstances, one acre of land can only yield 200 to 300 catties of rice, and in bad times, one acre can only yield more than 100 catties."

Zhang Hulan reached out and stroked the rice ears, saying, "When natural disasters occur, it's considered a good harvest if we can get more than 100 kilograms per mu. When natural disasters occur, there is basically no harvest at all, and the people have to rely on digging wild vegetables and eating tree bark to survive."

Xie Xiaoman sighed, "People are indeed suffering. I hope that the hybrid rice cultivated by adults will be successful, so that people can harvest more food every year. With food stored at home, we don't have to worry even if we encounter natural disasters occasionally."

Xie Xiaoman then sighed again and said, "Sir, why do natural disasters happen? How wonderful it would be if there were good weather and good harvests every year? What on earth is going on with these natural disasters?"

Zhang Hulan thought that Xie Xiaoman’s wish would never come true.

Not to mention here, even in her previous life with such advanced technology, she could not change the climate, and various natural disasters still occurred frequently.

Zhang Hulan said: "Most natural disasters are caused by the climate. Sometimes we have continuous heavy rains and floods, while other places are experiencing droughts.

Do you know that the rain that falls on this day is all evaporated from the ground to the sky, and then falls down. "

Zhang Hulan pointed to the clouds in the sky and said, "If the water vapor on the ground evaporates to a certain extent, it will form dark clouds in the sky and then turn into raindrops and fall down."

Xie Xiaoman asked in confusion: "Sir, I can understand that the water on the ground evaporates because the weather is too hot, but why does it form clouds and then turn into rain?"

Zhang Hulan asked, "Have you ever boiled water?"

Xie Xiaoman nodded, "It has been burned."

“When water boils, can you see steam rising?”

Xie Xiaoman nodded.

"When you opened the lid of the pot, could you see a lot of water dripping from it?"

Xie Xiaoman continued to nod.

"That's it, isn't it? When the water vapor reaches a certain level, it will condense into water again."

Zhang Hulan pointed at the white clouds in the sky again and said, "Look at the white clouds in the sky now. This is because there is less water vapor and the cloud layer is thin. When the water vapor condenses to a certain degree, it will turn into dark clouds, and then it will start to rain."

"Oh, I understand. You adults are amazing. You even understand these things." Xie Xiaoman was full of admiration, and then she asked, "What about hail? Why does hail occur in summer?"

"Are you asking a hundred thousand questions?" Zhang Hulan looked at Xie Xiaoman speechlessly, but still explained, "Because the hail clouds are higher.

The temperature gets lower as you go higher, just like it is cooler on the mountain than at the foot of the mountain.

Sometimes it snows in the mountains, but not below them.

So when some clouds float higher, what falls is not rain."

Xie Xiaoman admired him so much, "Sir, how come you know everything?"

"I didn't expect that Zhang Tunjian also studies climate and the cycle of heaven and earth?"

A voice sounded behind Zhang Hulan and Xie Xiaoman.

Zhang Hulan looked back and saw that it was Qin Bingrong. He quickly saluted and said, "Your humble servant greets Lord Qin."

"Greetings, His Excellency the Prime Minister." Xie Xiaoman also hurriedly bowed.

Qin Bingrong smiled and said, "I didn't mean to eavesdrop just now, please don't blame me, Zhang Tunjian."

"No, no, I'm sorry to have made you laugh, Master Qin."

Qin Bingrong said: "The Ministry of Industry has finished the water pump. I am here to deliver it to you."

"Master Qin can just have someone inform me. How dare I trouble Master Qin to deliver it in person?"

"It's okay. I have nothing to do, so I came to take a look."

Qin Bingrong pointed to the office room and said, "All the things are placed over there. Zhang Tunjian, go and take a look."

Zhang Hulan then went with Qin Bingrong to see the finished water pressurizer, as it was needed now.

The water press made was similar to the one Zhang Hulan had used before. The pipes connecting the water press were also made, which were made by opening up the bamboo joints.

Zhang Hulan took a water pump to the well and asked Xie Bangwen to arrange for someone to find two stone slabs to install and fix the water pump.

Pour some water in it and then shake the lever.

There was a "creaking" sound, and then water was pressed up.

Zhang Hulan asked Xie Bangwen to try it out. "Master Xie, feel it and see if it is very easy to draw water like this."

Xie Bangwen tried it and found that it didn't require much effort at all and large amounts of water were pumped up.

Then he let the people who were working try it, and after trying it, they all said it was good.

"This thing is good! This thing is good! If we use this thing to draw water, one of us can irrigate 20 acres of land in one day."

Qin Bingrong also admired Zhang Hulan. He wondered how she came up with the idea of fetching water in this way.

Zhang Hulan asked: "Master Qin, how many have the Ministry of Works produced so far?"

“We have made ten so far.”

"Are the others in the Ministry of Works? Then I'll have someone get them."

Qin Bingrong coughed dryly and said, "Ahem, this is the only one left. The rest were divided among the emperor and several ministers."

Well……

Zhang Hulan was speechless.

Qin Bingrong said: "Minister Zhai has already asked the Ministry of Works to rush the production, and it will be produced in large quantities in a few days."

What can Zhang Hulan say? She can only wait.