When Mark woke up again, he was greeted by a metallic ceiling, and the space around him was very large, and he tried to find that he was breathing easily, and he should have arrived in a safe place.

This place is very unfamiliar, Mark walked forward for a while and saw the sign of Star City, his heart relaxed a lot, it seems that Nina teleported himself back to Space City, at least he doesn't have to worry about how to return anymore, which saves a lot of trouble. The place looks like an underground pipe gallery area, through which communication lines, power lines, and oxygen pipelines all pass, leaving enough passage for technicians and vehicles to pass through and overhaul.

Mark walked a long way and finally found a communication point, and he immediately contacted Sun Tan, saying that he was still safe and still in the space city, so that he didn't need to send someone to find him. Mark doesn't know how long it's been over here, is the flow of time in this world the same as in the horizontal axis world?

"Where are you going? I'm almost going to send a search and rescue team to find you in the storm circle! What's crazy about when it's so dangerous? Do you know if you get caught up in it, you're going to die! Sun Tan roared on the other end of the communicator, but Mark was in a good mood, and Mark was already very happy to hear him again.

"Okay, okay, I see, I just fell when I started the spaceship, and the spaceship rushed out, and I didn't know how to fall into the underground pipe gallery, and then I have been in a coma until now."

This is the most convincing statement Mark can come up with now, although it is full of loopholes, but Sun Tan did not study it in detail, Mark does not plan to tell him about Nina for the time being, even if he tells him, Sun Tan will definitely not believe it, and he should suspect that he is not mentally normal.

To be honest, Mark himself was a little skeptical, everything he had just experienced...... Was it true, or was it a hallucination he had after he fainted?

The rescuers arrived soon, it was much easier to get him out of the pipe gallery than to rush into the storm to find him, the doctor quickly checked Mark's physical condition, everything was normal, Mark took advantage of the fact that the others were not paying attention, and checked his eyelids with a mirror on the wall, there was a white spot underneath, which represented that he had had an operation.

So how do you explain what just happened? Nina just injected his consciousness into the body of Mark in another world, and now she sent him away again, and everything is back to normal. Mark asked about the change in time, and now it had been three hours since he "fainted", and Mark calculated that he had spent almost the same amount of time on the other side, and it seemed that time passed equally quickly between the two worlds.

Although Mark didn't have any injuries on his body, but he was still sent to the medical room by the medical staff, Mark speculated that this was Sun Tan's meaning, and he was worried that Mark would cause something on the spur of the moment, so he simply put him in jail, Mark didn't have any opinion, his goal had been achieved, this meeting with Nina in the Axis World, Mark had already received enough revelations, and now he just needs to slowly digest it and apply it to the future road. After coming to the medical room, Mark found a bed to lie down, and the medical staff left after the examination, just letting him rest well, thinking that he was suffering from the sequelae of hibernation and too much mental pressure.

Mark tossed and turned on the bed, constantly recalling what he had seen and heard in the horizontal axis world before, and suddenly he found that there was something pressed under him, there was nothing in his pocket, and now it felt like he had pressed some square stiff object, Mark was the only one in the room, he looked again and saw that there was no surveillance camera on the top, so he rolled over from the bed and took out the strange thing from his jacket pocket.

It was a stiff square box, about the same size as the ring box, black throughout, reflecting the surrounding light like a mirror, smooth and warm to the touch, like a large piece of black crystal that had been polished into a square, through the box you couldn't see the object inside, this thing looked like a crystal, but it had almost no weight in your hand, as if holding a ball of air, no wonder Mark didn't feel its existence at all before.

"This is ......" Mark has no impression of this thing, he has never seen such a thing, this thing is not his own, and it can't be that it was in him before, then there is only one possibility! This one was given to him by Nina!

To be precise, it was Nina who had transcended the limits of the horizontal axis world, and among the countless possibilities in the parallel world, only one coincidental possibility of her was born.

This thing is what she left behind! She said that she couldn't give Mark a hint directly, because that would upset the balance of the world and lead to very serious consequences, Mark originally thought that what she told herself in the horizontal axis world was all she could say, but she didn't expect that she also left extra clues!

This box contains the maximum hint she can give me, she can't tell me directly, she can only give me a hint through which I can slowly deduce the final answer, this gentle method can minimize her influence on the horizontal axis world. Mark suddenly had a very strange feeling, and after following that Nina around the horizontal axis world, Mark also began to look at the whole problem from a special perspective.

Whether he opens the box or not, he will create two completely different branches of the world line, both of which will run parallel to the main axis of the horizontal axis world, and in the future, because of his single action, more different branches will be expanded, and perhaps one of them will be ...... will be the final perfect ending.

And the final ending must be the world line after he opened the box.

Mark took a deep breath and was mentally ready to open the box, the black box was very light, he just opened it with a flick, the lid just opened a small gap, Mark saw the dazzling light emanating from it, the moment the lid was opened, Mark saw a familiar scene, he used to doubt whether it was real, and now he no longer doubted, the revelation that Nina gave him completely resolved Mark's doubts.

The spouts of brilliant stars converged into a cluster, and the flipped glowing clusters were wrapped in a large number of nebulae that were constantly rotating and jumping, and through the surface of the sphere Mark could see countless brilliant spiral arms of star clusters, he had seen this thing before, only for a moment, and after that he could never prove that it really existed.

This is the origin of enlightenment.