And at the same time modern times.

Gu Sang shuddered inexplicably and looked up at the sun in the sky.

The weather hasn't gotten colder yet, why did I suddenly feel cold just now?

"Goddess, you must keep warm and don't get sick."

"Yes, Goddess, I've always wanted to say that you're wearing too short a skirt. You'll get sick."

Because Gu Sang was going to meet the teacher he had made an appointment with before, he turned on the live broadcast as soon as he got off the car.

However, this live broadcast is not open to everyone, only to Plague City.

This was not the first time that Gu Sang had given Wencheng private tutoring. There had been two such times before, both times when Gu Sang had specially visited industry teachers to explain to Wencheng the manufacturing of weapons and tools.

Although it was already night on the other side, the people in Plague City were still standing there watching her live broadcast with high spirits.

"Today we are visiting a doctoral supervisor who is an expert in agriculture, forestry, animal husbandry and fishery."

The four words "agriculture, forestry, animal husbandry and fishery" are closely related to life in ancient times, so people in ancient times took them very seriously.

Gu Sang arrived at his doctoral supervisor's home in the suburbs and happened to see him taking a few students up the mountain to observe the planted trees.

Seeing this, Gu Sang also followed the others up the mountain.

Along the way, the doctoral supervisor would occasionally give students questions, asking them what plants were on the mountain and what their functions were.

"Look, this plant is growing well. Look at its leaves..."

The morning sunlight filtered through the leaves, casting spots of light on the doctoral supervisor. The supervisor spoke in a steady voice, neither hurried nor slow, explaining to the students.

"This teacher is so kind and knows so much. He must have a lot of students."

"Wow, it turns out that even old people can be so elegant and knowledgeable. They are much better than those scholars who talk nonsense. At least they know the plants in the mountains."

"Hey, it turns out this grass can be used as medicine. I often have headaches, and I remember this grass! We have it here too! Next time I'll pick some and make tea with it."

"It turns out the fruit is sour and tart. It might not be due to lack of sunlight. It turns out there's a genetic problem. Goddess, can you help me ask about grafting?"

The eldest princess had already arranged for several gentlemen to sit in the front row and memorize the knowledge points mentioned by the doctoral supervisor.

Some literate people also squatted on the ground with paper and pen to write.

Whenever the princess saw this situation, she would ask them to come and write on the desk in front.

Of course, the princess will not prohibit other people from learning this kind of hard-core knowledge. Anyone who likes to watch the live broadcast can watch it and ask questions at will.

The eldest princess also found several people who were more familiar with farming and agriculture through these exclusive lectures. When others were still confused, these people were already able to draw inferences about other situations by analogy.

Even Gu Sang, a modern man, was amazed at his learning speed.

Is this the difference between a top student and a poor student?

For some modern words, there is no need for Gu Sang to explain them, as these people can interpret them based on their solid professional knowledge.

When we arrived at the orchard on the mountainside, our supervisor was doing research and had planted seasonal fruits for spring, summer, autumn and winter. It was the time when seasonal fruits were ripe.

Among the students traveling with us, there was a tall boy who climbed up the tree directly and picked some fruits for everyone.

After having lunch at the mentor's house, Gu Sang followed the mentor to the fields.

"Goddess, why do you have to build something so high in the ground? And why is it surrounded so tightly?"

"Goddess, what is that white thing? Is it silk? Is it cloth or something else?"

Gu Sang took a look and replied, "This is a vegetable greenhouse. Planting vegetables inside can create a greenhouse space, allowing people to eat out-of-season vegetables."

"The roof of the greenhouse needs to let in sunlight and be cold-resistant. It is usually built with multiple layers of protective plastic film and some light-transmitting materials..."

Before coming, Gu Sang read some information.

So she can answer such simple questions by herself without asking the tutor.

As soon as he finished introducing himself to everyone, Gu Sang followed them to a greenhouse.

There is also a temperature and humidity meter inside the greenhouse, which allows people to observe the temperature inside the greenhouse.

There were already many fruits there, and every tree was laden with fruit. Gu Sang picked up a fruit, peeled it and started eating.

"Why is this thing so strange in shape?"

"Ahh!!! Why is the juice of this thing red?"

"This thing looks like it's very expensive."

Gu Sang ate the fruit in a few big mouthfuls, wiped his mouth and hands with a wet tissue, and then explained to everyone:

"This is a red pitaya, a vine plant from the cactus family. The fruit is very sweet and delicious. It is heat-resistant and loves heat, but cannot tolerate low temperatures."

After hearing Gu Sang’s statement, the ancients became more envious. How come there are so many delicious foods in later generations?

All kinds of plants, fruits and vegetables they had never seen before.

I can eat fresh vegetables at any time, and I can eat summer food and vegetables even in winter. It’s really enviable.

When they saw several other students taking out bags to pick the fruits and eating them while walking, all the ancients were drooling.

“They tasted delicious.”

"I envy the future generations so that I can eat so many fruits."

Although the eldest princess's expression did not change, her eyes were dancing with a strange light.

Tropical regions, overseas!

Dragon fruit, corn, sweet potato, cotton...

These things all come from overseas.

One day, she will definitely send someone overseas to bring all these things back!

At this time, Zhou Qichen squeezed through the crowd, walked to the eldest princess and whispered.

"Princess, we've spotted the imperial army twenty miles outside the city. It's packed with soldiers. We can't tell how many troops the imperial court has sent, but we estimate it's no less than 150,000!"

Pei Changying had been on the throne for less than two years. The political situation had just been stabilized because of Concubine Gu, and the enemy troops on the border were eyeing them covetously, so most of the troops were stationed on the border.

Where did so many soldiers come from to attack the city?

The princess pondered this in her heart, but remained calm as she ordered, "Don't let the people in the city know yet, to avoid causing panic."

"Go tell General Qin and put him on alert."

"The imperial soldiers are only following orders. Ultimately, we are all citizens of the same land. We will first use courtesy and then force. We will see what the imperial court says. If they insist on fighting, we will fight."

Zhou Qichen took the order and left, and Gu Sang also saw the eldest princess and Zhou Qichen whispering to each other. She looked at the eldest princess with a questioning look.

The eldest princess immediately understood what Gu Sang meant and nodded slightly.

"Okay, that's all for today's live broadcast!"

The live broadcast has been going on for several hours, which is enough for the ancients to digest for a while.

Moreover, there were already large imperial troops stationed outside the city, so Gu Sang left time for the eldest princess to make arrangements.