If time travel could come true, what time would you most like to meet?

When I wanted to go back to high school, I always felt ripples in my heart when I thought about it. It was graduation season one year, and in the afternoon, the students in the class were busy exchanging greeting cards and postcards, which were full of feelings and blessings to each other. Unexpectedly, I also received a postcard, which was sandwiched in my language book, I opened it in surprise, and a line of juanxiu handwriting came into view, "I didn't have time to participate in your past life, I hope your future can have my existence", this is clearly the girl's handwriting, and then looked at the final signature, I don't know if it was surprise or excitement, the irrepressible little heart was beating non-stop, and the face was slightly flushed, I quickly hid the postcard, for fear of seeing it at the same table.

I turned my head and stole a glance at the girl who gave me the postcard, and it just so happened that she was also looking at me, not only because she was nervous or shy, but her face was also slightly red, and she looked at me and lowered her head. I like the taste of my first love very much, but now I can't go back.

I would like to go back to my sensible childhood, since I was a child, I began to be obedient and read to understand my parents, I can share housework and all aspects for my parents from an early age, and I can also manage the friends I have made since I was a child, and I can also know that I have developed my network since I was a child, broadened my resources, and learned all aspects of knowledge. If you go back to the past, you will pick up the people you missed before, never give up, and you can correct all the wrong things you have done in the past. Back in the past, you can express the love that is not expressed now to relatives, friends and family.

Back in the days of reading, imagine the mottled old classroom where everyone huddled together to listen to the lectures, and look back at the girls you like. I think back to playing football with a group of people, going to class and eating. If you can go back to your student days, you should cherish your time on campus.

Go to the library often, make good friends, and fall in love at least once.

If I could turn back time, I would like to go back to my sensible childhood, since I was a child, I began to be obedient and read to understand my parents, I can share housework and all aspects for my parents since I was a child, and I can also manage the friends I have made since I was a child, and I can also know that I have started to develop contacts, broaden resources, and learn all aspects of knowledge since I was a child.

Go back to the time when you were at your most down, and tell yourself not to give up even if it's hard. It's nothing now, everything will be fine in the future. Go back to the time you left TA and tell yourself not to let go because you will regret it for the rest of your life.

Go back to when you were young, tell yourself not to indulge your body with your youth, because when you get old, you will use all the money you earned before to see a doctor.

I would like to go back to when I was a child, when my mother waited for me at the door of the hut, the twilight was vast, the evening breeze was long, and the evening breeze was ......Childhood is the best time in life, and it is beautiful because every day we live carefree like little animals. When I was a child, my mother left me a song, no sadness, no sorrow, and sang it, and my heart was full of joy.

Back in the old street of my childhood, the sound of "jingle jingling" bicycles can be heard in the distance, bypassing the mossy alleys and stepping on the splash. With childhood playmates, playing in the water, climbing trees on the mountain, not afraid of heaven and earth, and the yellow earth as one, happy and satisfied. I was often hungry, but when I got home, I ate a lot of food, and my siblings snatched up the food at once, and they were happy.

My parents get up early every day and are greedy for darkness, and they don't know how to say loving words, but they always leave us with the best food.

This question involves theoretical knowledge of time travel and its paradoxes. If time travel really exists, then:

It is theoretically possible for people in the future to return to the present and meet us. Time travel means crossing the timeline, then the connection between the future and the present becomes possible.

However, if people in the future really return to the present, it is a paradox that the timeline of their return to the present may change the future, causing them to disappear or change the timeline of the present. In this case, they are either stuck in the past or they can't go back to the past.

According to the multiverse theory, time travelers going back in time would create a parallel universe. Within this new universe they can meet us without changing the original universe. This avoids the paradoxical situation described above.

It is also possible that the universe we live in was changed by the actions of time travelers. Their travels created the line of the world we have now. If that's the case, then the time traveler has actually been with us all along, just we can't realize it.

So theoretically time travelers can go back in time to meet us, but to avoid the time paradox, they are either stuck in a specific past, or their actions create a parallel universe.

Another possibility is that our entire worldline was altered by the behavior of time travelers. This is a very interesting experiment in reflection that touches on many philosophical issues of time travel. However, at present, time travel is still not in the category of science fiction, and it is difficult for us to judge whether it really exists and is possible.

It's more of a thought experiment on the nature of time and the consequences of relativism. If time travel really becomes a reality in the future, then these problems will also arise and become the hotspot of human society.