As time passed, Wu Qing pulled himself away from the chatting and laughing and thought about serious matters.

Wait, they want a map!

What seven-breaking sword? That’s not important.

Wu Qing rubbed the dust on his fingertips from prolonged contact with the charcoal pencil, and changed the subject: "Your Majesty said before that you know a thing or two about the mountains and rivers of the capital?"

Prince Ding smiled and nodded slightly.

“I can’t say I know every place, but at least I’m familiar with it.”

"Your Majesty, actually..."

Wu Qing coughed, "Compared to rabbits and swords, Your Highnesses would like to learn how to paint landscapes more."

She gave a look, signaling the princes to cooperate.

The princes naturally understood what he meant, and they all echoed, "Yes, Uncle Eight, we want to learn landscape painting, especially the landscape of the capital."

Prince Ding couldn't help but laugh: "So that's how it is. Your Highnesses came to Lord Qin to learn this. If I had known that Your Highnesses had such an interest, I would not have drawn the Seven Sacred Swords for Your Highnesses."

The second prince has feasted his eyes.

The four swords drawn by Prince Ding were enough to make him excited for the whole day.

So he said nonchalantly: "Uncle Ba, there is no need to be so reserved. Just teach us according to your own wishes."

"Your Highness, thank you for your compliment. My landscape paintings are really mediocre, just clumsy ones."

Prince Ding sighed softly, seemingly with a hint of self-mockery.

"My royal brother often says that my paintings lack the taste of literati, and are more craftsmanlike than spiritual."

"But if Your Highnesses are interested in learning, I am willing to teach you everything I know and give it a try."

This is Prince Ding's usual humble attitude.

Prince Ding claimed that his painting skills were mediocre, but everyone had just seen the stunning painting hanging on the wall and was not fooled at all.

The eldest prince suggested, "Uncle Eight, can you draw Yushan?"

"We haven't been to Huguo Temple since the incident. I don't know what it looks like now. You are familiar with Yushan, so why not use it as an example?"

Huguo Temple was built on the top of Yushan Mountain.

Ever since the incident at Huguo Temple, Yushan has become a forgotten topic.

Occasionally, pedestrians and tourists climb to the top of the mountain, but are unable to enter the blocked gate of the temple.

The silence of Huguo Temple gave those temples outside the capital an opportunity. Qingjing Temple, Wuji Temple and other temples seized the opportunity to expand their customer base and took away a large part of the pilgrims that originally belonged to Huguo Temple.

Nowadays, there is very little news about Yushan.

It is understandable that the princes were curious about Yushan.

Prince Ding thought about it and said, "This is worth painting."

He pondered for a few seconds, dipped the tip of his pen into ink, and concentrated carefully.

In just a moment, an exquisite literati landscape painting appeared on the paper.

The three of them moved closer to take a closer look.

The painting features green mountains and gurgling water, which shows the artist's superb skills.

but……

If someone says that this mountain is Huangshan, Shishan, Jingshan or Socrates Mountain, they will believe it!

This is what landscape paintings are like. It is difficult to tell which mountain is in the painting.

Anyway, with the literary attainments of Wu Qing and the other two, they really couldn't tell the difference.

Seeing that the three people looked normal, Prince Ding said in a low voice: "It was just a casual work. I'm sorry to make you laugh."

Wu Qing hesitated and said, "...Well, that's not the reason. Your Highness is too modest. This painting is already quite vivid."

"That's right, we prefer this kind of picture..."

She picked up a pen and drew three circles of lines from the inside out on the paper in front of her, then marked the height on each line.

From inside to outside, the heights are three hundred, two hundred, and one hundred respectively.

"Your Majesty, please look, this is a mountain that is more than three hundred feet high."

The princes were at a loss for words.

Concubine Ji only drew a few circles on the paper, how can you insist that she drew a mountain?

Prince Ding also frowned and looked over, puzzled.

Wu Qing pointed at his ugly pattern and explained, "Your Majesty, this diagram can be used to represent the ups and downs of the ground and the height conditions."

"The same line indicates the same altitude."

She pointed at the innermost circle with a pen and said slowly, "This line is marked as 300 zhang, which means that every place on this line is 300 zhang."

The tip of the pen touched two more circles.

"Similarly, this is a line of two hundred feet, and this is a line of one hundred feet."

What made Wu Qing sad was that none of the three people present understood what she meant.

Especially when being stared at by Prince Ding, Wu Qing felt at a loss.

…It’s like, the smartest student in the class can’t understand what you’re saying.

【Geography teacher, I'm sorry. 】

Wu Qing secretly wiped his sweat in his heart and said guiltily, "Maybe this contour map is too ugly, they don't understand what I mean."

Wu Qing continued his efforts.

She drew a similar pattern in the blank space on the right, but the circles on this pattern were obviously much more crowded.

"Where the lines are denser, the ground slope is steeper."

Wu Qing put the tips of his two index fingers together to form a small mound.

"Your Highness, please look. The mountain in the picture on the left looks like this, with a very steady slope."

She retracted her index finger and replaced it with her two thumbs, then put her arms together and made another small mound of earth.

“The mountain in the picture on the right looks like this.”

This time the height of her small mound remained the same, but the slope became much steeper.

Wu Qing cast a hopeful look at Prince Ding.

Just like the look the math teacher gave the smartest kid in the class all those years ago.

[Based on my teaching level, this is the best I can do! ]

[Your Majesty, please use your smart brain to understand this! ] Wu Qing prayed silently in his heart.

[In fact, it is just to convert the three-dimensional scene into a two-dimensional plane figure. 】

And Prince Ding did not let her down.

After Wu Qing built two small mounds with his fingers, his originally slightly confused eyes suddenly became clear and bright, like shining stars that were lit up.

The more he thought about it, the more moved he became.

Ji Guiren is indeed different. He can depict the shape of the mountain with just a few simple circles.

This kind of map is too accurate in representing the shape of the mountain.

Prince Ding learned from his experience and also picked up a charcoal-based paintbrush and started painting on his own paper.

His hands were steady, and the circles he drew were rounder and more standard than Wu Qing's.

"According to your painting method, this is a two-peaked peak."

Prince Ding turned his wrist slightly and drew six circles of different sizes in one go.

They wrap around each other, layer upon layer, and are much more complicated than Wu Qing's original drawing.

Prince Ding said: "The left peak is towering into the clouds, about three hundred feet high; the right peak is slightly lower, but still more than two hundred feet high."

Then he stretched out his index finger and gently tapped the curved line between the two peaks.

“The curved part of this line bulges upward, just like the depth of a valley, accommodating all things and gathering wind and energy.”

Prince Ding looked at Wu Qing with a smile and said, "Your Excellency's drawing is very good, but I wonder if I have understood your meaning?"

Wu Qing: “…”

She stared at him with a sad face, feeling mixed emotions.

[You're not that smart, are you? ]