After Xiao Yu heard Yu Xing's words, he obediently followed Yu Xing forward.

They walked into the mirror dimension and began to practice with the robots.

Mo Lao came to guide as usual, and he saw that Yu Xing had really started to practice physical strength, and nodded.

After he can withstand the level of muscles, it will be a reborn experience to take him to bone refining.

It should be soon, and it can be arranged during the summer vacation.

……

After eating, Yu Xingxing did the problem for a while, and the code on the screen flowed from the bottom to the back like a reverse waterfall.

The whole room was still silent.

Suddenly, a phone rang, and Mao Ling'er also jumped.

"Jingle bell, jingle bell .......", Yu Xingxing's mobile phone ringback tone is a very good singing voice, it is for the other party to listen to, and it is still a very orthodox phone ringtone on his side.

Hurriedly rushed over to pick up the phone, Yu Xingxing said into the microphone, "Hey? Who is it? ”

"Brother Xingxing, you know what? That little stone sprouted, and I saw little feet sticking out of it! Fat Tiger's sister Li Lingyue shouted on the phone.

"Good thing, will it go?" Yu Xingxing was also in high spirits.

"I've been looking for where its head is, but I haven't found it." Li Lingyue was a little depressed.

"In this way, it looks like it has to grow its head out before it can go, otherwise how can it move its legs?" Yu Xingxing chatted with Li Lingyue very patiently.

Then Li Lingyue asked again: "How is your little stone?" ”

"Uh......" Yu Xing didn't know what to say.

"Brother Xingxing, I know that little stone of yours can't stick out of your little feet, come and take a look." Li Lingyue said, "It's free to show you." ”

"That's ......" Yu Xingxing was just about to say no, but the other end of the phone called again: "Brother Xingxing, why don't I bring it over to you?" ”

Then, obviously, the phone on that side was heard shifting places.

"Brother Xing, Xiao Shi just stretched out his little feet today, Xiao Yue is so excited. If you're busy, don't bother with her. Fat Tiger's voice.

"I'm done with this question, and I guess I'll come and have a look around 2 p.m." Yu Xingxing glanced at the wall clock on the wall, it was 11 o'clock in the morning, and it would be afternoon after a while.

"Okay, you're busy, I'll see you later." After Fat Tiger finished speaking, after hearing Yu Xingxing say goodbye, he hung up the phone.

Yu Xingxing knew that Fat Tiger must also want him to pass.

Later, when he arrived in a new class, there were fewer and fewer opportunities to play together.

Hurriedly sat down in front of the computer and buried himself in the calculations.

Uncle George saw that he had a good grasp of it, and he increased his depth and progressed faster.

He began to study quantum theory, which required a much larger amount of computation.

As he deepened his studies, Yu Xing became more and more interested in the door that disappeared in front of his eyes and the space behind the door.

Is Planck's constant in that space different from Earth's?

Why do they sometimes show up and disappear in front of your eyes when the door closes?

Is it just a visual deception, like stealth?

Or is there some secret control switch?

What's inside?

Yesterday, he also didn't find a chance to ask Uncle George, who probably had to learn quantum theory in its entirety, and Uncle George might tell him.

Before that, he was still bored to study and calculate.

I guess I asked Uncle George, and it was in vain, because Uncle George would say, "You don't understand it."

Finally finished, Yu Xingxing sat up straight and stretched.

"What do you want for lunch?" Mao Ling'er asked him.

"I'm craving pizza, the kind of mozzarella cheese with prawns, diced meat, green peppers and a lot of mozzarella cheese."

As he spoke, Yu Xingxing couldn't help but lick his lips, and he really wanted to eat it in his mouth right away.

I immediately ordered a pizza takeaway, and it was said that it would be delivered in a while.

He wanted to finish eating quickly, so he could go to Fat Tiger's house early.

So when the pizza arrived, he cleaned it up and threw a piece of it to Xiaoyi, and he ate it with relish.

Then, get on your bike and run fast towards Fat Tiger's house.

Li Lingyue was already waiting for him at the door, and when she saw him coming, she ran over from afar.

"Brother Xingxing~" she shouted and ran over.

Yu Xingxing propped herself on the ground, carried her to the bar in front of the bicycle and sat diagonally, and then rode towards her house together.

"Brother Xingxing, you didn't see that little leg, it's really amazing, the little hamster's legs are thicker than it." Li Lingyue chattered all the way.

Soon they were at the door, and Fat Tiger was also by the door to greet him.

After driving the bikes to the yard and putting them away, they hurried to the living room.

Fat Tiger's parents are still busy going out, and only the two of them are at home.

The three small stones that Li Lingyue brought back last time were carefully placed by her into the three open bottles on the coffee table, and there was a little water in them.

The three of them sat down on the couch and began to study.

Yu Xingxing took out his small glasses again and looked carefully, and inside was the skeleton of a bird.

The eggshell in the small stone had been shattered, and strangely enough, it had stuck its feet out first, as if its head was blocked by something.

Do you want to help it break through the rocks?

Obviously, this is a small bird, and if it can't get its head out, it will definitely not be able to go.

Yu Xingxing gently knocked the place where the bird's head was on the table, and a crack broke it.

The bird soon struggled to break out of its shell.

However, the outside is still surrounded by small stones, and it still can't fully spread its wings.

Yu Xingxing had heard that the life of this little bird coming out of the small stone was very short-lived, and it could not last a week at all.

Is it because these stones are imprisoned?

Thinking of this, he looked at Li Lingyue: "Xiaoyue, shall we knock open the stone outside it?" ”

"Huh?"

Li Lingyue obviously didn't understand what Yu Xingxing meant.

"Knock on these stones, and the bird will be completely reborn, and maybe live a little longer." Yu Xingxing explained to her.

"Huh? Is it really a bird? Li Lingyue still couldn't believe it.

Yu Xingxing showed her the small glasses.

Putting on small glasses, Li Lingyue saw the small skeleton in the small stone clearly.

"Oh my God, it's really a little bird, let's get rid of it!"

Fat Tiger also put on small glasses and looked at it: "Damn, I only heard that a monkey jumped out of the stone, and now it is about to pop out of the bird!" It's incredible! ”

"It's a bird!" Yu Xingxing reminded again, and glanced at the fat tiger again, and the fat tiger touched his head embarrassedly.

"We're going to be their saviors!" Li Lingyue said solemnly.

"There are so many small stones, we can't buy them all and rescue them." Fat Tiger reminded that he was worried that she would buy them all on a whim.

"Don't think about it so much, let's try one first." Yu Xingxing said.

He picked up a small stone and gently knocked it on the table, knocking out the cracks in the surrounding stones, but did not directly peel the stone off.

Then he put the stone down and nodded at them.