After the cataclysmic era, the Federation has established underground cities in every urban area.

The origin of these underground cities was originally due to the excavation of underground sinkholes in various veins of the federation and the excavation of tunnels under the city and then reinforcement, and then due to policy changes, the tunnels were opened up to build an underground city for a large number of people to live.

It's just that in most ordinary urban areas, underground cities are not very prosperous, and can even be described as slums, dirty trading areas, gathering places for vagabonds, beggars, and pickpockets.

Only in a prosperous base city like Wujing, the underground city has developed quite popularly, not much worse than the ground.

Of course, unless the underground city is the kind of city with sinkholes underground, the land price must be much lower than that on the ground, and few upper-class elites are willing to live underground.

However, killer forces such as Hidden Killing, which walk on the edge of dark gray, like to establish their forces in underground cities, where the mixed and relatively chaotic order situation is the most suitable for the development and growth of such forces.

After Tang Jian drove to the entrance of the underground city behind Hua'er Street, he took the shuttle card.

Like him, there are quite a few other card masters.

Some of these people drove like him, some people urged Xianxia Card Edgeworth to come, and even some drove small mechas, as long as they did not hinder the traffic in the city, it can be said that there are all kinds of transportation, which is dizzying.

The entrance to the underground city is a large building that looks like the Colosseum of ancient Rome, with a circular structure, and the huge portal with a height of more than ten zhang is like a huge mouth of a fierce beast, arranged around this circular building.

There are a total of 36 large portals, all marked with different door numbers, so that all visitors can identify the door numbers and go to different areas of the underground city they want to visit.

Tang Jian chose the "J22" door to enter, and after entering, you can see the huge hall like a super square inside, a dome with sunlight falling down up to 100 meters, and dozens of large lifting platforms throughout the hall that can accommodate hundreds of people at a time, each of which is also marked with an area code.

The lift platform is like an alternative subway, carrying people on stage to different areas of the underground city.

Tang Jian paid the entrance fee of 300 federal coins, boarded the lifting platform to the underground city of Heluo District, and stood with the hundreds of people who took the stage together.

When someone who is late to the stage hurriedly wants to squeeze inside, the lifting platform will sound a piercing alarm, indicating that the load is exceeded, and the staff will immediately invite the late crowd out.

...

A few minutes later.

The platform descended almost a few hundred meters and came to an underground city isolated by a large barrier.

The air here is a little muddy, but it's also buzzing.

Step out of the transit station and you can see the bustling street market.

There is a blue card [Phantasm Sun Card] that condenses the spirit medium in the air to form a large artificial sun, and the temperature of the sunlight released is suitable, and the time is basically synchronized with the ground.

At night, the energy output of this Mirage Sun Card will be canceled, and the Phantom Moon Card will be used instead of levitating in the air, providing a unique living environment for the people living in the entire underground city.

Tang Jian walked to the crowded bazaar, and before he had taken two steps, a bald man in a monk's uniform approached, with a smile on his face, "Donor, the old man is called Bo Qi, here are the latest seed materials, I don't know if the donor needs it?"

As he spoke, the bald guy quickly took out two cards from his satchel that emitted a glowing white glow, and the thief smiled, "It's the latest version of "The Cunning Female Card Master Aoi" and "The Heroic Card Master Inspector Momoya", how about it?"

"Cough!" Tang Jian choked, looked at the pedestrians around him left and right, and awkwardly pushed away the hand handed over by the other party, "No, don't do it, I've been a little short of nutrition recently." ”

"Hey, donor, the so-called wine and meat have passed through the intestines, and the beautiful woman has left in her heart, a pair of stinky skins, lack of nutrition, and the most important thing is spiritual pleasure and fullness, you say......"

Tang Jian walked away quickly, too lazy to pay attention to this big fool.

There are all kinds of messy cows, ghosts, snakes and gods in the underground city, and it is very common for immortals to jump here, so it is best not to have casual contact with strangers.

Obviously, when the other party found him, he must have seen that he was young and easy to be deceived, but no one would have thought that he Tang Jian would be reborn and returned, and he was completely an old driver.

...

Seven crutches.

Tang Jian cautiously turned into a fork in the road, casually slapped away the palm of a young man who was quickly reaching for his pocket, and glared at the other party.

The other party glared back without showing weakness, made a grimace and quickly ran away.

"Damn! It's so arrogant to be a pickpocket. Tang Jian scolded in a low voice, and he didn't bother to chase it.

The law and order here are relatively chaotic compared to the ground world, and so many pickpockets have not been destroyed, in fact, it can be said that it is extremely scary.

Tang Jian stood in the alley, ignoring the suspicious, greedy, and tentative eyes of a few homeless men in the depths of the alley, his fingers touched the blue-eyed white worm card, but his eyes searched the black wall covered with various patterns and advertisements.

The graffiti on this wall is full of messy things, and the most of them are some kind of gray transactions, and the one who writes the advertising words is more talented than the other.

"She's been through a lot of battles, she's come out of the rain of bullets, she's familiar with all kinds of gunfighting, she has a very high tactical level, and she is now retired from the army and has received tactical training for any employer's needs......"

"The girls' group card making training class, suitable for all ages, children are not bullied, one-to-one card making, three-to-one card making, one-stop team training package, only you can't think of it, we can't do it without us. ”

"When I was reborn, the smell here hasn't changed, and it really pollutes my pure heart. ”

Tang Jian quickly looked away, and his eyes swept away without a trace, and a surveillance elf floating in the air at the entrance of the street, sometimes flashing past the other side.

Eyes soon found the desired target near a pile of small advertisements.

It was a nondescript skull-style QR code carved into a bunch of small ads.

Tang Jian quickly took out the membership card of the Hidden Killing Blood Deed Fair, and scanned the QR code after urging.

Suddenly, a light screen similar to a communication card appeared on the surface of the membership card, and a clear map appeared on the light screen, pointing to the location of a flashing red dot.

...

The Hidden Pact Trade will be established in a different location in the underground city of each base city, and will even change regions every once in a while.

Therefore, it is difficult for non-members to know the true location of the Hidden Death Contract Fair.

After Tang Jian got the map, he quickly urged the Shuttle Card to drive over.

The area of the underground city is not small, and it is divided into many areas, and various cards with different functions provide different functions for the entire underground city, such as ventilation, water supply, energy supply, insect removal and deodorization, etc.

The buildings in the Herro district are compact, with large alleys and alleys leading in all directions, and there is even an established air train passage in the air, and you can hear the whistling of the train as you pass by.

Tang Jian drove for about ten minutes to an old-fashioned residential area in the middle of nowhere.

Parking the car outside the residential area, Tang Jian walked to a shop with an open door.

The shop sells some ordinary snacks and fruits, but when Tang Jian inadvertently revealed his skull-style membership card, he was invited into the courtyard by the shopkeeper.

Walking into the courtyard, there is a cave.

Deep in this compound, hidden by the influence of magic cards, the interior is like a large leisure club, the environment is as bright as day, and the brilliant lights are staggered, and it is very lively.

Under the feet is a smooth tile pavement, overhead is a dome dozens of meters high throwing all kinds of beams of light, on the walls on both sides of the huge magic card screen, playing some commodity auction information, trading things and rules, etc.

Walking from the outside of the door to the inside of the door, it is like two completely different worlds, from the moment of silence to the excitement of a moment, in just a second.

Tang Jian walked in from the courtyard entrance of the store.

He looked around and noticed that in some other places in the distance, there were also people who had entered through the portals that suddenly appeared out of thin air, and it seemed that none of them had entered the fairhouse from one location.

There are also people who walk and suddenly disappear into thin air in a certain area, as if leaving the trade club, and the flow of people is endless, and it is completely like a luxury shopping mall, but the atmosphere is relatively impetuous.

Tang Jian turned around and saw that there was a man wearing a butterfly mask walking gracefully behind him, and the entrance to the courtyard he had walked in earlier was gone, as if he had appeared in this brightly lit hall out of thin air.

"Kid, you're new here?"

Seeing Tang Jiansilly standing in place, the noble man holding a green handbag in his hand covered his mouth and chuckled, his eyes behind the butterfly mask flashed with brilliance.

"Huh?!" Tang Jian glanced at the other party suspiciously, feeling a little chilly.

A man walks and twists, wearing a butterfly mask and holding a handbag, if he hadn't always been very polite, he would have wanted to hit someone now.

Tang Jian nodded casually, he didn't want to communicate with this person more, but unexpectedly, the other party stood still and continued to talk to him, very familiar.

"Haha, I know that you are a newcomer, the first time you come to the contract fair, what do you want to buy?"

Tang Jian frowned slightly, glanced at the other party, and suddenly his heart moved, "There should be materials such as White Feather Flying Elephant jade powder and Qilian Flower Path sold here, right?"

The butterfly masked man covered his mouth and smiled, "The reason why the Hidden Killing Contract Trading Club was established in an underground city is because many of the transactions here are gray transactions, and what is on the ground must be there here, and what is not on the ground will be available here." The material you are talking about is very common. ”

As he spoke, the other party winked at Tang Jian, "I've been here for a long time, I can work as a part-time rookie guide, as long as you give me ten contribution points or a thousand federal coins, I can take you to find what you want." ”

Tang Jian smiled, "Yes, I'll give you 1,000 federal coins, you take me to buy materials first, after buying materials, I still want to try to join the hidden killing, do you know any way?"

"You?," the butterfly masked man glared at Tang Jian in surprise.

"Not bad. Tang Jian affirmed.

"It's not impossible to join the hidden killing...... But that may be a matter of life. The corner of the butterfly mask man's mouth hung a hint of playfulness, "But life is precious, and money is even more expensive, as long as you can afford it, I can take you to try it." ”

"That's walking. ”

Tang Jian waved his hand, and when the butterfly masked man turned around, a smile flashed in his eyes.

Now that one of the two purposes of coming here seems to have been successfully achieved, I wonder if his cautious behavior can play some role, don't throw a flattering eye to the blind......