Listening to Tian Xiaoyu's question, Fang Yu fell into deep thought.

Fang Yu is a good thinker, no matter what kind of problem he faces, he will think hard and give answers cautiously, from this point of view, he is a very trustworthy Taoist friend, so back then, maybe he was right. Tian Xiaoyu couldn't help but sigh in her heart, full of regret, not regret that this love ended without a problem, but regret that this love really made her lose a close friend.

In Tian Xiaoyu's world, there are two kinds of men of the same generation, familiar and strange, and familiar men are divided into two kinds, their own men and their brothers. is called a brother to a man, not because she is a female man, but because she is a real man. Once, Tian Xiaoyu was also confused about her sexual orientation, she was not sure whether she liked men or women, there were many men and women among her friends, and the men said that they loved her and the women also said that they loved her, she liked both men and women, but maybe she was young at the time and didn't think there was any difference between the two likes. However, as her experience grew, Tian Xiaoyu gradually realized that her sexual orientation was normal, because when a female friend offered to teach her to kiss, she was scared away......

When he first crossed here, Fang Yu was in Tian Xiaoyu's heart, his first boyfriend, and he never forgot it, but after a period of getting along, in addition to the only fragmented memories, there were no other feelings, if you want to talk about emotions, there is still a little bit of resentment, mainly for the grievances and dignity of his own passive party when he broke up, but contradiction is a major factor in promoting the development of things, emotionally speaking, contradiction is an absolute assist to promote finding the right person for him and the way to get along with him, Since there is an irreconcilable contradiction between himself and Fang Yu, breaking up must be the best ending, otherwise? Waiting for the Chinese New Year? Therefore, Tian Xiaoyu, who wanted to open up, more and more classified Fang Yu as his brother.

"Hmm, do you remember Einstein's theory of relativity?" Fang Yu asked Tian Xiaoyu while reminiscing.

Tian Xiaoyu shook his head and said: "I can't remember much...... "After work, I am getting farther and farther away from technology, these advanced basic knowledge is still in high school and college, but to tell the truth, every student at that time was really awesome, did calculus, learned the theory of relativity!

Fang Yu saw that Tian Xiaoyu was addicted to his own daze and couldn't extricate himself, so he continued: "In the theory of relativity, is there a part of it that talks about time dilation? ”

"Oh?" Tian Xiaoyu was puzzled, "Time dilation? Is there an argument under what conditions a time slowdown or even a time can be crossed by formulas? ”

As a rookie in the true sense of physics, Tian Xiaoyu can understand so much, probably Fang Yu is the same, but this argument may have opened the door to questions in Tian Xiaoyu's heart.

Tian Xiaoyu remembers that in this argument, the necessary conditions for traveling through time are that the speed is higher than the speed of light and the mass is close to infinity. However, if the speed is fast enough, in which direction? She couldn't think of anything faster than the speed of light except thoughts; If the quality is big enough, your own quality? No, it's only one hundred and thirty pounds before I weighed it......

No matter how many, even if there are thousands of impossibilities, I have indeed crossed over, existence is reasonable, since it exists, then behind this, there must be a theoretical basis to support its establishment! On the other hand, if you can come here, you must be able to go back!

Thinking of this, Tian Xiaoyu was excited, couldn't help but pat his thigh, and looked up to the sky and laughed twice: "Perfect!" ”