Ao Chongtian looked at the big black door in front of him, and also shook his head: "Huoyan City is located in a remote area, surrounded by dangerous mountains, and the climate is hot, and sometimes it will be attacked by fierce beasts. But this kind of place is the favorite place of the rebels, decades ago, when I was not imprisoned by that impostor, the rebels attacked the city of Flame once, and the rebels were still a small force at that time, and they were not afraid, but they still broke through the defense line of the city gate and attacked it.

However, due to their lack of supplies, they were eventually repelled by the guards, after which the city began to build underground passages, and there were many more such passages, all in case the city was occupied by the enemy one day.

I don't remember having this gate when the underpass was being built, it's clear that it was built by the impostor. ”

After listening to this, Chen Fenghua stood in front of the black door, glanced at it, and after a while, he saw a small hole in the top of the door, which seemed to be a keyhole.

"This door should be open with a key, but we don't have a key." The flowery boy saw that Chen Fenghua noticed the keyhole, so he added.

Chen Fenghua took out a key from his backpack by mistake, in fact, he didn't know if the key he touched from the soldiers in the City Lord's Mansion would be the key here, but it didn't hurt to give it a try.

There was a crisp sound of "card rubbing", and the four people present raised their eyelids at the same time.

Chen Fenghua pushed it with his hand, and at first the black door did not move, but as his strength gradually increased, the door actually shook. Seeing this, the three people behind also helped out, but they were helpless against this door just now, but now they have moved their steps and pushed the door open.

I didn't expect that the key was really from this iron door, Chen Fenghua thought, but this is too coincidental, why is the key touched not the door in another passage, but just this iron door? Suddenly, he realized something, and even walked in first.

There was darkness in front of them, but it only brightened up under the effect of his light technique, and when they saw the qiē inside, the four of them were shocked.

"This is the main city system!" Ao Chongtian was the first to speak.

"You know?"

"That's not right! The main city system should be in the city lord's mansion, how can it be in this place?! ”

Although Ao Chongtian had been imprisoned for decades, his mind was still very clear, and the complex symbols and mechanical circuits in front of him were indeed dazzling, but he still realized that this should not be the location of the main city system.

Then, it seems that the qiē is the same as Chen Fenghua thought, this is not the location of the main city system made by the Meng people, but the main city system developed by the rebel army, and they prepared a qiē a long time ago.

"What's next?" Xiaoxiao asked. This question is not only hers, including Chen Fenghua, I don't know what to do, he is just a master-level engineer, although he has the design drawings of the three main city systems, but in the face of such a complex engineering product still does not know where to start.

Suddenly, his eyes lit up, and he immediately took out two metal teleportation arrays from his backpack, installed them on the ground, straightened up and said, "You guys wait here first, don't let anyone get close to here, and don't touch this thing, it will break if you touch it, I'll be back soon!" ”

Chen Fenghua pointed to another metal teleportation array and finally admonished, and then went up to the metal teleportation array in front of him, and after a mechanical friction sound, he disappeared in place.

He didn't go anywhere else, but returned to the Mon clan's land, and as soon as he appeared, the Meng disciple who had specially received him repaired the metal teleportation array on the ground and asked him what was the matter.

"I want to see your deputy patriarch."

"Okay, I'll take you there." Because of Meng Chuan's advice, Chen Fenghua has long been a distinguished guest of the Meng clan, although he doesn't know why the Meng clan is so good to him, but he also accepts this love, after all, he needs help very much now.

Under the leadership of the children of the Meng clan, after entering the mechanical town, he came to the place where the deputy patriarch Meng Chuan worked.

Walking into the high-rise building again, he didn't have so much leisure to admire, and went straight to Meng Chuan's office, and then saw Deputy Patriarch Meng waiting on the sofa.

"Deputy Patriarch Meng, I need an engineer above the grandmaster level to follow me." Without too many pleasantries, Chen Fenghua got straight to the point.

Meng Chuan pressed his hand and said, "Generally speaking, the children of the Meng clan with the title of grandmaster or above are not allowed to go out of the territory of the Meng clan, but since you need it, then I can help you find it, but you have to be responsible for the safety of my Meng disciples and don't let them go into danger." ”

"Okay." Chen Fenghua knew that the other party was suing him for breaking the norm and selling him a favor, but he still agreed.

"Okay, you go to the metal teleportation array in the forest and wait, I'll call someone over." Meng Chuan pushed the frame of his glasses on the bridge of his nose, turned around and left the room.

Chen Fenghua also left the room and returned to the teleportation array in the forest, and a few minutes later, a short-haired old man wearing a blue robe and thick glasses came running over, and at a glance he knew that he was an authentic old pedant, and he had no doubt that the other party had the title of grandmaster-level engineer.

After he told the old engineer the serial number of the teleportation array, two flashes of light flashed back and forth on the metal teleportation array, and both of them left.

……

"Sister, what is this?" Xiaoxiao pointed to the metal teleportation array on the ground and asked, she had just seen Chen Fenghua disappear in front of her eyes like this, which made her puzzled and surprised at the same time.

"I don't know, he'll be back in a moment and ask him." The young man replied, and she was also full of curiosity.

Suddenly, there was a piercing sound of mechanical friction from the metal teleportation array, and he saw Chen Fenghua's body suddenly appear here, but he didn't say hello, but immediately squatted down and began to repair this mechanical item similar to the teleportation array, when he finished repairing, there was a screeching sound on the metal teleportation array, and in the blink of an eye, there was another person.

That is the old engineer of the Meng people.

"Mr. Meng, ...... here" As soon as the old engineer appeared, Chen Fenghua wanted to explain the situation in front of him, but only halfway through the conversation, he saw the old engineer raise his hand to stop him from continuing, and then walked step by step to the complex lines and mechanical arrangements in front of him.

Chen Fenghua and Xiaoxiao Huahua and the others, you look at me, I look at you, and at the same time silenced, at this moment, no one is more familiar with and understands the qiē here than the old engineer in front of them, what they can do is not to disturb the old engineer to analyze the qiē here.

At this moment, there is still chaos in the regional channels of Flame City, and the news that the Temple of Faith has been breached frequently, to the point of burning eyebrows. Chen Fenghua couldn't help but be angry when he saw it, now that the Temple of Faith has been destroyed, it means that the player's independent resurrection will be delayed by an hour, and the combat power of the players in the main city will be reduced a lot.

Players don't dare to get on it, and the beast is even more rampant. Although Chen Fenghua didn't want the beast to be killed, he didn't want Huoyan City to become a victim of war and become a ruined city.

Suddenly, he saw a message - the red monster had moved in the direction of the City Lord's Mansion!

Chen Fenghua frowned and stretched out again. From the beginning to the present, only the red beast appeared, and the rebels did not come here, after the beast made a big fuss and destroyed the most important temple of faith in the city, the beast returned to the place where it appeared before, it is clear that this beast only played a leading role, and now that the task is complete, it will return to the place where it came from.

If his guess is correct, in a few moments, the rebel soldiers will appear, and then the entire main city will be truly in chaos, and at that time, the players in the main city will be passive and will become prisoners of the rebels due to the destruction of the Temple of Faith.

As soon as Qiē looked anxious, Chen Fenghua looked at the old engineer in front of him who was repeatedly groping for machinery.

At this time, ten minutes had passed, and the old engineer had no intention of stopping, he was like a child who saw his beloved toy and couldn't put it down, so he forgot the time, and didn't know what had become of chaos outside.

"Bang!"

At this moment, there was a loud bang, and a cool breeze blew in his ears, and he saw a person hit the mechanical instrument in front of him and fell to the ground.