For more than ten days, Lin Chen and the black cat took a wooden boat to the direction of Chang'an, this is the first time that Lin Chen has entered the hinterland of Haoran Tianxia, different from the remote area at the junction with Nanxu, with the march to the east, the Tang people in the land of Haoran Tianxia gradually increased.

A small village every few miles, a small town every tens of miles, a city every hundred miles, the city is big and small, the small one is as big as the county-level city in Lin Chen's memory, and the big one is not much better than the two in the legend, Lin Chen was amazed when he looked at it on the wooden boat.

"Lin Chen has not yet arrived in Chang'an, when you arrive in Chang'an, you can really feel what is called a behemoth, according to our speed, we can reach Chang'an in two or three days, there is a large array near Chang'an, we need to slow down, and the sixteen passes leading to Chang'an are guarded by people from the Tang Dynasty military or the Holy Courtyard. ”

"I didn't expect that we would all be in the air and there would be immigration checks. Lin Chen sighed, he and the black cat flew east from west to Chang'an, every time they passed through a city, they would encounter the history of air inspection above, they were densely spread in every place above the Tang Dynasty, monitoring all flying things in the air, every time they met them, the black cat would be extremely skilled to take out a jade silk, when the air inspection history was checked correctly, Lin Chen and the black cat were proud to continue west.

Even in the air, I am afraid that the investigation on the ground is even more rigorous, Lin Chen did not expect that Datang, who was in a foreign land, actually did what no country in his memory did.

"Lin Chen, what are you thinking?" The black cat couldn't help but whisper when it saw it, its eyes kept rolling, and its face seemed to be speechless.

"It's nothing, Dazun, if you have anything, just say it directly, you can also see it, I am a waste person now, if you want to expel me from the Holy Land of Dazun, I have no complaints. ”

Lin Chen glanced at the black cat, since he was getting closer and closer to Chang'an, the black cat seemed to be preoccupied, Lin Chen knew that it must have something to hide from him, but the black cat didn't take the initiative to say, Lin Chen pretended not to know.

"Lin Chen, do you remember the essence of the aura you told me before?" After a moment of hesitation, the black cat spoke casually, placing its two front paws behind it, standing like a human, making the appearance of a tall cat outside the world.

"The essence of aura?" Lin Chen was slightly stunned, and then he remembered what he said casually when he first stepped into the cultivation, "This aura can't be heard or seen, but it can be felt, isn't it similar to light?

"You mean Reiki is light?"

"How can Reiki be light, light is light, it is shining on us, think about it again?"

The black cat shook its head, signaling to Lin Chen that this was not the answer it wanted.

"Reiki is not light, but it is something similar to light, and I said before that Reiki is a substance, but it has wave-particle duality. ”

"Yes, yes, that's it, wave-particle duality, Lin Chen, tell me what this wave-particle duality is?"

"How do I know what it is, it's just a casual mention of me. Lin Chen pursed his lips, after entering the university, the knowledge related to physics was limited to Lin Chen's memory of a certain term, and how he had long forgotten it.

"Why are you so interested in this now?" Lin Chen was a little surprised, staring directly at the black cat, "When I told you this before, you said that what I said was a fallacy, why are you so interested in this now?"

"I have a friend in Datang, she is a teacher in the same holy institute as me, she has been studying Reiki, demonic energy, Haoran Qi, etc., I accidentally said one day that Reiki may be similar to light, what characteristics of wave-particle duality it has, she seems to have suddenly come to the spirit, and has been asking me how to prove wave-particle duality. ”

"I casually said that you dare to publicize it, or in a place like the Holy Courtyard, maybe wave-particle duality does not exist at all, and Reiki is Reiki. ”

Lin Chen shook his head, he made up his mind not to talk nonsense with the black cat in the future, if he let someone know, I am afraid that he will have doubts about his origin, thinking of this, Lin Chen couldn't help but feel a little worried in his heart, the Wu clan may have known their secret.

"Hmph, if you don't tell me, someone will always come back to look for you when the time comes. The black cat's eyes rolled slightly, "Those people may treat Lin Chen seriously in this way, and don't let him die in half a year, this kid has more things in his stomach." ”

After a brief exchange between a man and a cat, there was silence, both of them having their minds on their minds, until two days later, when the speed of the wooden boat suddenly slowed down, and the black cat slowly stood up and looked ahead.

"Chang'an has arrived!"

With the opening of the black cat, Lin Chen saw that the clouds and mist in front of him quickly dispersed, and an endless city gradually came into Lin Chen's eyes, it was a city completely shrouded in the aura of Haoran, and before it was close, Lin Chen felt the vast aura emanating from the city.

"The front is the West Second Gate, the whole city of Chang'an is built in a square, the southeast and northwest are divided into four directions, there are four city gates in each direction, the city gate and the city gate are separated by a hundred miles, a total of sixteen city gates, fifty miles away from the city gate, we need to stop from the air, otherwise the large array of Chang'an City will destroy all unidentified flying things in the air. ”

After the black cat finished speaking, he took Lin Chen to land seventy or eighty miles away, and at this time Lin Chen gradually understood the prosperity of Chang'an City, from the time they landed from the sky, Lin Chen began to see all kinds of people or things or demons also landing, in less than a quarter of an hour, Lin Chen saw tens of thousands of people dozens of miles in front of the West Second Gate, and there were more people coming from afar.

Lin Chen glanced at the people around him, these people were either riding wooden boats like them, or riding strange beasts, or sitting in ordinary carriages like the world, and these people were dressed in a variety of ways, some were dressed like scholars of a certain dynasty in his memory, wearing a scholar's hat on his head, carrying a bookcase behind his back, and a shining jade pendant hanging from his waist.

There are also people with weapons in their hands, of course, the weapons are all placed in the sheath, each qi is deep, Lin Chen glanced at it casually, and saw a lot of body cultivation in the Bone Boiling Realm, and a few Lin Chen couldn't even see the depth, thinking that it was at least the realm above the Grandmaster Realm of the Four Realms.

Lin Chen knew that those young people dressed as scholars should be the legendary Confucian cultivators in the world, but he didn't know if they were people from the Holy Academy, and those physical cultivators should be martial arts people like Yan Ruonan, what made Lin Chen strange was not these, except for these people, more of these tens of thousands of people were neither Confucian nor physical, but mortals who had no cultivation at all, but these mortals were mixed in among those cultivators, and they couldn't see any fear and abnormality at all.

What Lin Chen couldn't accept the most was that he also saw a lot of goblins, real goblins, maybe the transformation was unsuccessful, there was often a certain part of their bodies that still retained the characteristics of demon beasts, Lin Chen saw with his own eyes a fox demon wearing human clothes, with a tail behind him, but his head was like a fox's head, and he was talking and laughing with the mortals beside him.

"It's ......".

Lin Chen felt that his three views had been greatly impacted, these people stood together like old friends who had been friends for many years, and there was no sense of disobedience, although these people were of different races and identities, they had a common feature standing in front of the West Second Gate of Chang'an, that is, they were extremely consciously lined up in a long line, even if it was a monster and a cultivator, they did not have the slightest complaint and impatience, until a voice full of anger came from dozens of miles away.

"Open the gates ......"