"We've tested it below 1,500 meters." Dad said.

"What's the situation?" I said puzzled.

"We asked the U.S. to share data with a lot of money and we were denied, but we bought a U.S. expert with a lot of money. He offers a narrative that you see. Dad whispered in my ear.

"See what?" I said.

Dad pointed to the camera on it and flipped over the file. There is a blank page of paper with some drawings and words on it.

I got up and stretched, and took the papers into the bathroom, knowing that none of this was publicly available.

I was in the toilet looking at my father's notebook, which was a drawing.

Several pipes began to fold at different angles from about 1,500 meters and converged on a large dot with four words written underneath: Holes are connected.

I wondered if it was the hemp rope that had broken after 1,500 meters had rubbed against the fold.

Where the friction has formed, a smooth cross-section, and the real things have all converged to a point?

At the bottom of the picture there is also a 163 email account and password, which I logged in with my phone. There was an unsent email on it, and my father left it with the words: Rely on this communication.

I got up and walked out of the bathroom, handed the file back to my dad and said, "Go back to the room." ”

Dad got up and went back to his room, and I went back to my room.

I opened the mailbox again and kept refreshing it, and soon there was an unsent email in the mailbox.

I thought about using unsent emails to log in to the chat with my account and password, as long as the data doesn't go out and can't be monitored, which is really a good way. I looked at my phone and it said: I want to fool the country to go down and have a look, and the American expert said that less than five countries know that the hole will face horizontally and end up in one place after 1,500 meters, and the solution of these countries is to dig a hole of 1,500 meters not far away, and then dig it in the general direction. The United States has been doing this for two years, and the leaders of the United States have also said that they will follow the gourd after receiving the data. And I want to go down and take a look, I've already figured out a way.

I was stunned and said: If a person goes down directly, not to mention whether he will be killed at once when he encounters a cross-section. If you don't die and slide on that cross-section, won't the surface be rubbed into the same way?

I kept refreshing and got a reply from my dad: I had a bold idea, the end of the rope was rubbed and left the same cross-section. There should be no friction between the two cross-sections, as long as a plank is accurately lowered and assimilated in the cross-section, there will be no friction, and then the person can slide into the center point as long as the plank is placed.

I was a little surprised when I saw this, and I said again: It's too dangerous.

After sending a refresh, I found that my father left a message: I won't do it so quickly, I need to get a big piece of this cross-section. Of course, maybe you can go down directly with a wooden plank, and you can get the same result if you press on the plank without accident. It's okay not to even throw the plank clothes skin, because I've touched the smooth cross-section and haven't been assimilated, and constant friction may become just as smooth, but smooth shouldn't be fatal, right?

Seeing my dad using question marks, I knew that my dad didn't know the situation either.

I said: This is too sci-fi, isn't it?

After that, Dad didn't reply to the message, and there was a knock at the door.

I went out to open the door to deliver food, and ate at the table with my dad.

My dad said that he was going to the North Great Wall early tomorrow morning, and I said that I would also go to the interview tomorrow.