Xuantian City, the name is mighty and domineering, and it does occupy a lot of land, especially this city is backed by a turbid river, and there are many fields around the river that have been operated, crisscrossing and cutting the earth into squares, this is the first time Zheng Xian has seen green after arriving in this realm.

There are people working in the farmland, but the way of cultivation is still very backward cattle ploughing manpower, and there is no shadow of mechanization at all.

Zheng Xian felt very strange, in the past, Zheng Xian didn't know much about the fairy world, and he didn't have much feeling when he saw this scene, but now Zheng Xian's Dao fairy world and the mortal world will open from time to time, and some immortal sects such as the Yin Poison Gate and the Four Phase Gate will even often send some disciples into the world to lurk, that is to say, there will also be immortal cultivators who will return to the fairy world from the human world.

It stands to reason that after seeing the scientific and technological prosperity in the world, the immortal cultivators in the immortal realm should vigorously introduce some things, such as cultivation machinery and the like, even if they can't produce, it is not a problem to directly buy a large number of products.

In the hands of the master of the Yin Poison Gate, there is a treasure of the bead space, which can be put into the mortal world, and Zheng Xian carries it closely, basically putting all the good things in it. The accessories for the Ultimate Warframe, as well as those red mechs, are among them.

Whether it is oil or machinery, it can be transported directly, not to mention, farming machines are quite simple to drive, very quick to use, and much more powerful than manpower.

The introduction of some machinery can expand food production, and if the food output increases, it will be able to increase the population, not to mention that the population is more, and the rations of the immortal cultivators are also more, such a simple truth, Zheng Xian does not believe that the immortal cultivators did not think of it, but why did he not try in this direction?

It seems that the civilization of the world has not affected this backward world at all.

Zheng first thought about it, and then felt that he had only walked through two cities in the realm of cultivating immortals, one was controlled by the Yin Poison Gate to leave the city, and the other was this Xuantian City, there were too few places he had been to, maybe other cities were not like this, these two cities were relatively backward.

The so-called looking at the mountain and running a dead horse, Zheng Xian saw Xuantian City from a distance, but in fact, it was still more than ten miles away from Xuantian City.

And there was a huge sand pit in the middle, which widened the walking distance between Xuantian City and Zheng Xian a lot.

After descending the sand dunes, you can no longer see Xuantian City,

After Zheng Xian walked to the bottom of the sand pit valley, while moving forward, he took out the human skin mask created by the Sixth Division of Business from the treasure of space, this mask is made of silicone-like material, thin like a condom, with a slight bump on it, and when he pasted it on his face, Zheng Xian changed his appearance, his cheekbones were raised, and his nose was slightly raised, although it was only a few millimeters of change, but it was enough to change a person's appearance.

Every beard on the silicone mask grew out of the 'flesh', and Zheng Xian felt a slight itch in his chin again, which was also a small flaw, but this flaw was really nothing compared to that sense of reality.

Zheng Xian had worn this mask once when he was hunting Mo Xue, an A-level immortal cultivator of the Four Phases Gate, and at that time, Zheng Xian felt that this mask was quite useful, and it could even hide from the eyes of immortal cultivators, after all, this thing only has a thin layer, completely bionic and breathable, just like thickening a little skin, without reaching out and tearing, it is really not easy to see the flaws.

With this level of mask, it is also the reason why Zheng Xian dared to come knowing that Lu Dao was within the jurisdiction of the Land Gate, he was not afraid of meeting Li Jun again at all, and he was not even afraid that Li Jun would send someone to wait for him at the door to throw himself into the net.

Climbing the sand dunes is really close to Xuantian City, only five miles at most, and it is a smooth road, because there is a turbid mud river surging through, so the ground here does not look sandy, but there is soil that Zheng Xian has not seen for a long time, and his feet are quite solid on it, and scattered vegetation appears on the ground, although it is sparse, but each plant is quite tenacious, and there is a trace of water vapor in the air, no longer the dry breath that breathes and burns.

Not far away, there was also a road that could be moved by people who had not been seen for several days.

Having not experienced the desert without people, it is impossible to understand the greatness of the road in this world.

There were pedestrians on the road either walking towards Xuantian City or walking out of Xuantian City, which made Zheng Xian feel alive and prosperous.

Zheng Xian was not in a hurry to enter the city, although he was eager to return to the mortal world, but he also knew the priorities, now was not the time to be in a hurry. The closest way back to the mortal world is to ensure your own safety first.

Zheng Xian stayed outside Xuantian City for a whole day, during the day of Xuantian City, a total of more than 100 immortal cultivators entered the city, and more than 50 immortal cultivators went out of the city, the time was mainly concentrated around seven o'clock in the morning and around five o'clock in the afternoon, speaking of which, this is very similar to the rush hour of commuting in the mortal world. No matter what world it is, people's work and rest time is basically fixed, after all, the essence of human beings has not changed.

As for the mortals who entered and exited the city gate, the number was ten times that of these immortal cultivators, Zheng Xian did not count their number.

There are two portals in and out of Xuantian City, and the immortal cultivators walk through the grand gate, with a vermilion lacquer treasure top and bluestone paving.

And those mortals walked through small doors that were heavy and full of thorns, although the number of mortals was a hundred times that of immortal cultivators, the portal they entered and exited was only one-third the size of the portal that immortals entered and exited.

From the point of entering and exiting the city gate, one can clearly see the huge difference in identity and status between immortal cultivators and mortals in this realm.

The two time periods of each morning and evening are undoubtedly the best time periods for Zheng Xian to enter the city, but Zheng Xian's biggest problem is what kind of identity he enters the city, and even the cannibal sage has to look carefully to see that Zheng Xian is an immortal cultivator, this is Zheng Xian's biggest advantage, he can switch between immortal cultivators and mortals at any time.

Zheng Xian stayed outside the city, after weighing and pondering, he still decided to enter the city as a mortal, mixed in the mortals into the city, unassuming and inconspicuous, on the one hand, the number of mortals is extremely large, mixed in it is not easy to be found, and when the immortal cultivators enter and exit the city gate, they are often in groups of three or five, and there are very few single immortal cultivators who enter the city and go out of the city alone.

However, if you want to enter the city as a mortal, there is still a problem that needs to be solved.

These mortals who came in and out did not go far, they were all active within five miles of Xuantian City, most of them were actually working by the mud river, leaving early and returning late, Zheng Xian didn't even see any mortals coming from outside, only the area where those immortal cultivators were active was not limited to the area around Xuantian City.

Zheng Xian faintly understood the truth, since the immortal cultivators regarded mortals as pigs and dogs raised by themselves, then this city was a pigsty and dog pen, and the immortal cultivators raised pigs and dogs to kill and eat meat, how could they let the pigs and dogs wander around? This is somewhat similar to the household registration policy.

Zheng Xian was already very close to Xuantian City at this time, and when he saw that mortals walked to the gate of Xuantian City, they had to roll up their sleeves and show the guards, but the guards didn't look carefully, and basically waved their hands and let them go after a glance.

Zheng Xian has never been too close to Xuantian City, because of the angle, he can't see the things on the arms of these mortals at all, but Zheng Xian is sure that the things on the arms are proof of household registration, and there is no such requirement to look at the arms at the entrance of the immortal cultivators in and out of Xuantian City.

Since Zheng Xian decided to disguise himself as a mortal to enter the city, he needed to have such a household registration certificate on his shoulder.

Zheng Xian saw that the time was close to four o'clock in the afternoon, and in a short time, it would be time for the mortals to return to the city after a hard day's work.

Zheng Xian immediately touched the side of the wide mud river.

The muddy river was so turbulent that you could hear the roar of the river in the distance, fierce and deafening, winding all the way to the east.

The raging mud river burst into layers of black mist, which rose under the scorching sun, and the sediment fell like dust, and the water vapor gradually turned a misty white, like a cloud that continued to rise and wind away with the current.

From a distance, you can only see the water vapor climbing the river, but when you are really on the edge of the river, under the shroud of fog, you find that the scene is outrageous.

There is really a feeling of walking to the poor place of water and sitting and watching the clouds rise. Standing on the edge of this misty river, Zheng Xian felt like he had become an immortal.

Zheng Xian has been walking under the sun for the past few days, and his whole body is so hot that he is almost smoking, and at this time, he is steamed by the water vapor, and there are only two words left on his body.

If it weren't for the fact that the river was too muddy and too turbulent, and Zheng Xian didn't know the details of it, Zheng Xian really wanted to jump into the water and feel comfortable.

Zheng Xian stood on the edge of the river, and he didn't see a living creature for a long time, which was called a few days without a drip of mouth, and Zheng Xian, who wanted to have a good tooth sacrifice, felt a lot disappointed.

Zheng Xian vaguely felt that this river might be the Yellow River, of course, it could also be the Yangtze River.

The immortal realm and the mortal world, when they were stripped, the terrain and landform were exactly the same, just like a twin brother, but in the hundreds of years after the stripping, the topography and landform of the two immortal realms have changed.

In the mundane world, people are constantly changing the world, rivers are being diverted, forests and seas are becoming cities, reclamation is building cities, deserts are expanding, and the polar regions are gradually melting.

And compared with the changes in the fairy world, it is simply a world of difference, the changes in the fairy world can no longer be called changes, but should be called great changes, the original green mountains have become golden sand dunes, the original forests have become sand dunes, the original rolling rivers are now almost depleted, and they have become sand dunes, and this mud-like river, I don't know whether the road has existed for a long time, or the changes in the vicissitudes of the sea over the past few hundred years.

From this point of view, the power possessed by the immortal cultivators is still far beyond that of mortals, after all, it is really not easy to make the world of good people like this in just a few hundred years.

It is not completely unreasonable for the Sixth Division of Business to call immortal cultivators locusts.

If these immortal cultivators were to return to the mortal world, would the mortal world become like this in an instant?