The past 25 years are fleeting.

In the past five years, the earth has completed four orbital revolutions around the sun. The eccentricity of its orbital elliptical orbit is increasing year by year, and the distant point of the orbit of the earth is close to the orbit of Mars.

Due to the huge mass of the earth, the thrust of the planetary engine is still quite limited, and there is no way to directly push the earth away from the solar system.

Therefore, before leaving the solar system, the earth has to orbit the sun twelve times.

With the impetus of the planetary engine, the eccentricity of the orbit of the earth increases year by year.

In the end, Earth's astronomical point will approach Jupiter's orbit, and then use Jupiter's gravitational slingshot effect to make a final acceleration until the speed exceeds the third cosmic speed (here the third cosmic speed refers to the speed of the Earth's orbit around the sun plus the first Three cosmic velocities), thus breaking away from the gravitational constraints of the sun.

旅程 This journey is called the orbital acceleration phase, and it is also a key node whether the earth can escape from the solar helium flash envelope.

Earth's orbital acceleration is accelerating year after year. Whenever the earth gradually approaches the perihelion, the human heart will tighten. Rumors of the dungeon are rising that the solar helium flash is coming.

Until the earth falls to the distant point again, the human heart will gradually relax.

This is like a Russian-style bet on a cosmic scale. Raising the astronomical point is like turning a revolver and entering the perihelion is like pulling the trigger.

实质上 But in essence, there is no difference between the two. On the contrary, when the solar helium flashes at a distant point, the temperature of the dungeon will not rise instantaneously, but will gradually warm up.

Pang Xuelin didn't feel anything special. In any case, no matter in novels or movies, the final outcome of the Earth was a successful escape, but the process was a bit more difficult.

In the past five years, he has grown from a young talented scholar to an academician of the Chinese Academy of Sciences. He is also the vice president of Jiangcheng University. He is one of the top figures in Jiangcheng No. 1 underground city, and has even been elected as a member of the Science Committee of China .

In the wandering earth world, the government, the military, and the scientific committee stand on top of each other. Any decision by the government and the military must be reviewed by the scientific committee.

Therefore, in this world, Pang Xuelin is much higher in personal status and power than he is in the real world.

But it doesn't make much sense to him, he is not a man who loves power.

Most of the time, he still rotates in the laboratory, classroom and home.

Yao Bingxia has graduated from high school, which was unexpected by Pang Xuelin. This girl was influenced by him during the college entrance examination and chose the major of materials science of Jiangcheng University.

However, it is understandable that since the outbreak of the solar crisis, fields such as culture and art have been compressed to the extreme. Even religion has disappeared overnight and science and technology have been elevated to unprecedented heights.

So when at school, there is often an extra bug in the back of his ass. Most teachers and students in the school know the relationship between the two. Sometimes when they meet Du Jiaxiang who is already the president of Jiang University, the other party will jokingly ask Pang Xuelin , When can I drink the wedding of the two.

At this time, Pang Xuelin could only care about him in an awkward way, but Yao Bingxia would reply sweetly that she would be fine after she graduated.

The most unexpected thing is that Du Jiaxiang's student Gao Tianyi, this guy did not choose the academic circle after graduation, but entered the political circle, and is now one of the main leaders of the Jiangcheng No. 1 underground city management committee.

下午 This afternoon, Pang Xuelin came home from work and opened the door, only to find the room was dark.

Pang Xuelin froze slightly. The light in the corridor was still on when he entered the door. He thought the electric trip in the house had just started, and he was about to go to the electric switch room to see. There was a scent of wind behind him, and then a warm body leaned against him. On his back, he covered his eyes with his hands.

"Brother Kobayashi, guess what day it is, there is a surprise when you guess it!"

Yao Bingxia exhaled in his ear like a road.

She Pang Xuelin coughed, barely suppressing the strangeness in her heart, and said, "Xiao Xia, don't make trouble, today is the Arbor Day on March 12, neither your birthday nor any special holiday ..."

"Huh, sure enough, you forgot your birthday again!"

Crackled--

的 The lights in the room turned on, and then, various ribbons fell from the air. Yao Bingxia loosened her hands and walked in front of Pang Xuelin, smiling sweetly, "Brother Xiaolin, happy birthday!"

In five years, the original little girl has completely changed her appearance. Zhu Liphaohao, Qingdai Yunsi, and her eyes are bright and bright. Even if she has been with Yao Bingxia for so long, Pang Xuelin is sometimes shocked by her beauty .

I am at Jiangda University, Yao Bingxia is a well-deserved school flower, but because of Pang Xuelin's relationship, no one dares to pick this delicate flower easily.

"Brother, come with me."

Yao Bingxia pulled Pang Xuelin into the living room and looked at the cake on the coffee table. Pang Xuelin couldn't help but be surprised.

"Where did you get this cake?"

In this era, milk is a luxury product, let alone butter, and foods such as cakes are a luxury product. Pang Xuelin also met at the dinner scene of some major events.

Yao Bingxia said with a smile: "I did it myself, don't we have a quota of five liters of fresh milk every month? If you don't drink it, I will sip the milk for three months, and then go to the teacher of the food engineering laboratory, I made cream using a centrifuge in their laboratory. I asked Brother Gao to get the eggs for me. There are eight in total. They can be bought in the fruit market, but strawberries and kiwi are more difficult to buy. It is said to be an agricultural area. People secretly planted it in private. At present, it is only sold on the black market. It took me a full five hundred credits to get it! "

"You girl ..."

Pang Xuelin was touched and sad, and said, "Xiao Xia, if you really want to eat cake, tell me, I still have a way to get it, do you need to spend so much effort?"

Yao Bingxia said with a smile: "In the past, you gave me a birthday. Which time you did n’t ask grandpa to tell grandma and sold countless faces to get the cake. When you celebrate your own birthday, you just pay for it in the next bowl. This year I will I want to make a cake for you by myself. I still find tutorials for making cakes from the Internet. They are materials from the golden age. I do n’t know how many years ago, I succeeded once! ”

Xi Pang Xuelin reached out and touched Yao Bingxia's head. Yao Bingxia's eyes narrowed slightly, and her face showed a happy expression.

This is a small gesture of Pang Xuelin showing her intimacy, starting from the day when they entered the dungeon to live together, the two have long been tacit.

"Brother, all right, let's make a candle and make a wish!"

The raw materials of the cake are limited, and Yao Bingxia did not make too much, and couldn't put up twenty candles, so Yao Bingxia ordered one, representing Pang Xuelin one year older.

Chant

姚 In Yao Bingxia's birthday song, Pang Xuelin blew out the candle.

"Brother, make a wish, make a wish!"

Pang Xuelin said, "Will we make a wish together?"

"it is good!"

Shu Pang Xuelin closed her eyes, murmured in her heart for a while, then opened her eyes, and saw Yao Bingxia happened to look at her with a smile.

"Brother, what wish did you make?"

Pang Xuelin smiled: "I hope Xiaoxia will be happy all my life, and I will find a Ruyi Langjun soon, so I can rest assured ~ www.readwn.com ~ Huh, I do n’t want it, I want to be with Xiaolin Together, let ’s talk about it. Someone I want Ruyi Langjun does n’t know. ”

Yao Bingxia skittered.

"Uh……"

The atmosphere in the living room was embarrassing.

She Pang Xuelin had a headache. The girl didn't know what was going on. From the age of eighteen, she showed a special emotion to herself beyond the feelings of normal siblings.

He Pang Xuelin didn't know Yao Bingxia's meaning, but he couldn't stay in this world forever. Sooner or later, the two had to be separated. He had to pretend to be ignorant.

As a result, this girl has become more and more excessive.

来 "Come, eat cake and eat cake!"

Xi Pang Xuelin quickly cut the cake into pieces.

"Hum, coward!"

Yao Bingxia took the cake Pang Xuelin handed over, and bite a big bite, as if venting some kind of resentment in his heart.

Pang Xuelin had no choice but to pretend to be ignorant.

After a while, Yao Bingxia seemed to be almost out of breath, and then smiled and said, "Yes, brother, I didn't discuss it with you. I made my own decision. I told you that you should not be angry. ! "

Pang Xuelin said slightly: "What's the matter?"

Yao Bingxiadao: "Isn't the coalition government resuming the Olympic Games that have been interrupted for more than 40 years? I signed up for the electric ice ski rally and set off from Shanghai to New York!"

Pang Xuelin said while eating the cake, "It's good, this event is OK, I support you to participate."

Yao Bingxia smiled and said, "But I reported the mixed doubles project. I couldn't find a suitable teammate, so I added your name!"

"what?!"

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