——2004.7.26——

Shinto 2nd Avenue is the largest commercial street in Fuyuki, and it runs parallel to the 1st Avenue that crosses the Shinto Miengawa River, but because the scope only includes the Shinto, it is half as short as the 1st Avenue with the Miengawa Bridge as the midpoint.

The 500-metre-wide, 2,200-metre-long stretch of Second Avenue is home to more than 500 shops of all kinds, with the eastern section being mostly food, clothing and entertainment, while the western section is mostly electrical, computer and technology products.

Therefore, this avenue also has an interesting name called "Breakup Avenue", because as long as the man is left in the western section and the woman is left in the eastern section, they will never want to meet again, which is really a sad story.

After lunch, Ryunosuke and Olga Marie went to the electric street in Xindu to look for the accessories they needed, although "this world's self" seems to have a place to find good old goods, but "at this time" Ryunosuke does not know, so he can only take this genius girl to buy new items on her mental list.

"Well, I think about it, to complete the second step, you need to have a brainwave probe scanner, a data analysis decoder, an electrical signal compression amplifier, a gravitational black hole maker, a brain plug signal amplifier......" Olga Marie muttered to herself as she walked.

...... in this regard Ryunosuke said that he didn't understand it at all, and there were a lot of powerful-sounding words from the middle, so it was impossible for those things to be sold in ordinary electric streets.

"In short," Olga Marie explained, as she seemed to see the confusion in Ryunosuke's eyes, "the only way we can be sure of sending messages to the past is to send text messages through a combination of No.12 and No.8, and instead of trying to 'send more content' that doesn't necessarily lead to results, we should conduct an experiment of 'compressing people's instantaneous brainwaves to the size of a text message', which is simply compressing the data, which can be explained and improved by current technology." ”

"But, how do you 'unzip' after receiving? Do you have to make sure that it only covers the 'past self' and not others? Ryunosuke scratched his head.

"That's why you're going to do the test?" Olga Marie tilted her head and glanced at Ryunosuke with a foolish look.

Okay, got it, I'm a guinea pig, Ryunosuke shrugged and mentioned some of the bits and pieces that Tiolga Marie had chosen to buy earlier.

So who will tell him how portable ovens, power banks, LCD calculators, and AR glasses can help make a time machine?

After following Olga Marie around Electric Street for a while, and after buying something unbelievable, the two approached the middle of Second Avenue, and the aroma of food and the laughter of children gradually became clear.

"These things are not enough to dismantle, I'll go to the parts store to have a look, it may take a long time, if you are tired, go back first." Olga Marie counted what Ryunosuke was carrying, smacked her lips, and waved goodbye to him as she walked towards a large mechanical parts store nearby.

Sure enough, it's going to be demolished...... We civilian scientists don't understand the world of local tyrants, but after all, it's people's own money, so it's not good to say anything, Ryunosuke mourned for a few seconds for what he was carrying, and then turned around and prepared to go back to Camelot.

————

"Mr. Yusheng?" A slightly familiar voice sounded behind Ryunosuke.

When Ryunosuke followed the prestige, he saw a short-haired girl wearing a high school uniform in Suiqunyuan School Park.,But the face wasn't any of the students he knew.,Just about to ask.,In a blink of an eye, I saw the leather protection tied to her knees.。

"Oh, it's Matthew," Ryunosuke looked around, "You came by yourself?" ”

"No, Miss Lin Hao and Miss Illya brought me here, and they also lent me this school uniform, saying that they wanted to help me get acquainted with the city, but ......" She looked at the food court with some embarrassment.

Well, they must have gone crazy again.

"Well, don't you know how to get back? Come with me, don't worry about them, maybe you won't find out if you've lost you when you've had enough to get home and see you. Ryunosuke shrugged in amusement.

"Okay, okay." Matthew blinked and took the initiative to follow Ryunosuke.

For this strange girl,Ryunosuke after seeing a few "strangers" who suddenly appeared in the school park,There's also a little guess.,She's clearly different from the one I've seen at the beginning.,Whether it's demeanor or clothing and equipment.,So it's likely that it also appeared because of the "time and space text message" he sent.,If you follow the same rules,It's not Iliya or Lin Hao who is connected with her.,Anyway, it can't be Mr. Kelly or Shirou who has disappeared.。

"Mr. Yusheng, what do you think about time travel?" After leaving the Second Avenue, Matthew seemed to be a little more natural and took the initiative to talk to Ryunosuke.

"Hmm...... If it's not necessary, it's better not to change the past casually," Ryunosuke thought about the consequences of his "crossing" and shook his head: "Whether it's 'world reshaping' or creating a parallel world, after the change, everyone is completely unconscious, and only I remember the feeling that I am really some-"

"Well, I've heard of a theory of time, would Mr. Yusheng want to hear about it?" Matthew asked hesitantly.

This girl simply wrote the four big words "I'm suspicious" on her face, but it inexplicably made people not want to be guarded, and Long Zhijie didn't reply and said: "Tell me?" ”

"There is a theory of time that the world will diverge into countless parallel worlds like branches of a river, depending on the choice of whether to step on the right foot or the left foot when going out, to eat the vegetables or to drink the soup first, and that time travel changes just by jumping from one branch to the other."

Matthew said in the same tone as if he were memorizing a text.

"The first half of this theory is correct, but the worlds of subdivision are not innumerable, and if we continue the analogy of rivers, these tributaries will eventually converge with the main stream, and all traces of the previous branches will be erased, just like Mr. Yusheng sent those inconsequential text messages, which may have had an impact on the world 'then', but not enough to change the 'present', and only when one tributary 'merges' into another main stream and 'into the sea' is completely different can it be called 'changing the past'."

This point of view is different from but similar to Olga Marie's theory of "reshaping the world", and the key point of divergence is that-

"After a tributary changes its estuary, does the "main stream" where it originally located still exist? Ryunosuke asked.

"Yes, it ...... Of course there is. Matthew's tone was a little confused, as if to deny this "existence" was to deny herself.