Qiu Yue turned back and forth a few times, it was too cold, and suddenly said, "Chief, borrow your dagger and use it." ”

Liri was stunned for a moment and asked, "Dagger?" Why use it? ”

Qiu Yue stretched out her Qianqian jade fingers, straightened her long hair, her eyes were full of waves, and she showed a wry smile, "After following me for so many years, I will never give up, and it is time to let them play a role." ”

"Qiuyue, it's not here yet!" I feel sour in my heart.

"Everything that can be burned has been burned, things outside the body, there is nothing worth remembering, even if it is my last little effort, no matter what the future holds, after all, I have worked hard." Qiu Yuedai's eyebrows frowned slightly.

"Autumn Moon Girl......" Liri's heart is a little hot.

"Chief, it's not a big deal, throw it into the fire, let's pay tribute, pay tribute to the lost love, and pay tribute to these hard years of survival!"

Qiu Yueming's eyes were full of tears, perhaps because she thought of the sad past, or because she sighed about the hardships of fate, and then raised her head slightly and said, "Chief, if you don't ......, please help me?" ”

Liri was stunned for a moment, took out the dagger, locked his eyebrows, and slowly walked into Qiuyue, trying to touch Qiuyue's lubricated long hair with his hands several times, but he couldn't do it!

"Chief, it's okay, it won't be long yet, let's do it." The autumn moon whispered.

Liri knows in his heart that what makes him uncomfortable is not only that Qiuyue will lose her long hair, but that she is powerless in the face of cruel fate, and it is the deep self-blame that makes a woman involved in the responsibility.

With trembling hands, he gritted his teeth and finally made a move-

Long hair hit the ground, and the cold wind hit......

The weak Qiu Yue couldn't help but shiver a few times!

Liri's lips moved, the dagger was sheathed, and his hands were tightly wrapped around Qiuyue, and his eyes were full of tears!

……

Zhen Huan didn't know when he woke up, witnessed everything, didn't move at all, and let the tears flow!

As the smell of burnt hair spread, the firewood burned even brighter......

When Liri stood guard the next night, Ye Jing asked Liri to help him cut his hair short, and Bai Bingbing also asked Liri to help him cut his hair short.

On the third night, when Liri was standing guard, Yan Yu asked Liri to help him cut his hair short.

Not long after Yan Yugang cut his hair short and lay down, Zhen Huan got up.

"Chief, you're standing guard cold, aren't you? Why don't you bake it for a while? ”

"Queen, awake? I'm fine, I can handle it. Liri smiled.

"Chief, help me." Zhen Huan's eyes widened and he gestured with his hand on his hair.

"Queen, your hair is not very long, it will be cold if you cut it again!" I can't bear to leave the sun.

"It's okay, Chieftain help me, please!" Zhen Huan looked pitiful.

Zhen Huan couldn't leave the sun, and while cutting his hair, he sighed lightly: "Queen, it doesn't make much difference, why are you so troubled!" ”

Zhen Huan turned around suddenly, with tears in his eyes, "Chief, don't you understand, although it doesn't work, but you can rest assured, the women have done it, I am the queen, the mother of the world, can you be absent from this kind of thing?" ”

The moment of departure, he was enveloped in a rich sorrow, raised his eyes to the sky, and was speechless to the sky.

Her hair fell to the ground, Zhen Huan trembled, and without waiting for Liri to make a move, she took the initiative to hug Liri tightly......

…… ……

The blue moon rises, the fog wraps around, and it's night time.

"Professor Zhang, why is the weather getting colder and colder?" Shangguan Ting complained a little.

"It's a natural phenomenon that when there's heat, there's cold." Zhang Xiaoqi replied unhurriedly.

"Huh? Chief, a question suddenly occurred to me. Zhen Huan patted the departing sun on the side.

"What's the problem?"

"Didn't Professor Zhang say that he would take us all the way south?"

"yes, what's wrong?"

"There is no sunlight during this time, and there is no Alpha Star in sight, how does he discern the direction?"

Liri thought for a while, when marching on the earth, in addition to observing the trajectory of the sun, or using navigators, compasses, and even trees and moss to determine the direction, but the "stargazing" did not have these conditions, so he said: "You can ask him." ”

"Hey, Professor Zhang, what do you use to distinguish between the southeast and the northwest?" Zhen Huan directly pointed out the words.

"Queen, don't you see that I watch the sky every night? Of course, it is to look at the movement of celestial bodies to determine the direction. Zhang Xiaoqi seemed to know what Zhen Huan meant by asking this, and then added: "If there is a slight deviation in the route traveled during the day, it will be corrected according to the movement of celestial bodies at night." ”

Everyone doesn't understand the celestial phenomena, and they don't ask anymore, and what the scientists say is what it is.

"Uncle Zhang, who set the direction?" Ryuuji asked suddenly.

Who dictates the direction?

What is the problem?

All the adults are confused!

Everyone turned their attention to Zhang Xiaoqi to see how the scientist answered the question of a 6-year-old kid.

"Ryuuji, why do you ask this question?" Zhang Xiaoqi asked rhetorically.

"When I grow up, I want to be a scientist, and when I become a scientist, I can take people home and see them." Long Er's words aroused everyone's strong nostalgia again.

"Okay, well, since Ryuuji wants to be a scientist, today my uncle will teach Ryuuji from the question of direction." Zhang Xiaoqi was a little happy, as if the old monk had found the heir to the mantle.

Zhang Xiaoqi began to enlighten the science of Ryuer-

"Let's refer to the human beings of the earth......

Human beings have evolved to a certain stage, and there is a strong need for a sense of place, for example, after leaving home for a certain distance, it is difficult to return home without marking along the road.

As the range of human activities increases, people increasingly want to find a fixed point as a marker, with which people can use it to guide their route and know where they are at all times.

Where is this fixed point?

Almost all races of human beings have discovered the fact that the sun rises in the same direction every day, so people define the place where the sun rises as the east, which has a basic orientation mark.

Because of this sacredness of the sun, in ancient times, most of the different races had sun worship customs, some built sacrificial halls in the direction of the rising sun, and some worshipped in the place where the sun rose......

Later, it was discovered that the stars in the sky rotated regularly in the canopy every night, rising and falling, but some of the stars always hung in the sky, as if all the other stars revolved around them, so people took this direction as the basic azimuth mark, that is, the north.

With two basically fixed markers, East and North, humans found that many things were symmetrical, such as human eyes, ears, left and right hands, left and right feet, and so on.

According to this concept of symmetry, people find a symmetrical direction for the east and the north, so that the earth has four directions: south, east, west, and north.

With the four directions of east, west, north and south, human beings have a basic sense of orientation on the earth.

Later, human beings discovered that the earth is circular, and further subdivided the earth horizontally and vertically according to the four directions of southeast, south, north, and west, and longitude and latitude.

In this way, every point on the earth can be accurately represented by data.

Later, mankind invented artificial satellites, through which every point on the earth can be accurately located. ”

After Zhang Xiaoqi finished his tirade, regardless of whether Long Er understood it or not, he pointed to a few stars in the distance and said: "Long Er, do you see it, those stars are in that sky every day, in our 'stargazing', we can set their direction to the north, and its opposite direction is the south."

We are now walking in the opposite direction of these stars every day. ”

In fact, Zhang Xiaoqi's words were not only for Ryuji, but also for others, and he hoped that people would believe that the direction he was guiding was right.

As soon as Zhang Xiaoqi finished speaking, Zhen Huan smiled and said: "Professor Zhang, it's okay, master, such a simple problem has been made so complicated by you, and such a complex problem has been made so simple by you!" ”

Zhang Xiaoqi didn't care about life issues, his little head was full of theories, numbers and formulas, and after explaining the truth, he was praised by Zhen Huan and immediately smiled.

Seeing everyone's strong nostalgia, Zhen Huan suddenly remembered a sentence said by the mysterious person at the departure ceremony: "The tree is thousands of feet high and does not forget the roots, and the water flows thousands of miles and always thinks of the source." Then he said, "Professor Zhang, I'll ask you a question again." ”

"What's the problem?"

"What if one day in the future, our descendants ask us, where did our ancestors come from? How should we answer that? ”