Long Tianci and others stared curiously at Cao Youyi who was knocking at the door. This guy's knocking rhythm was very special. It was obvious that the knocking sound was a secret signal. People in the door would open the door only when they heard the secret signal. Otherwise, even if their hands were broken, the people inside would not open the iron door!

The underground secret room is so secret, and the iron door looks very thick. With such strict protection, what is Cao Youyi hiding? Before, Cao Youyi said that he did not belong to either the prince or the prime minister, so which side did he belong to? Is the secret behind the iron gate related to his position?

With countless questions, the crowd waited anxiously behind Cao Youyi. About three or four minutes after Cao Youyi knocked on the door, a series of chirping sounds came out in the big iron door, and then there was the sound of gear winch behind the big iron door. With this sound, the seemingly open door rose slowly.

The design of this door is really creative. If people who don't know why come in and see the door, their first reaction must be to push or pull. If they do so, those who want to open the door can only say that they are in vain, because the door is neither pushed nor opened, and the door rings and cracks on the big door are completely confusing, If you want to open the door, you don't want to go in your life unless you open it with a winch from the inside!

As the sound of the winch became louder and louder, the metal gate finally rose about one meter and five meters. After rising to this height, the whole gate stopped rising.

Cao Youyi turned back and waved to long Tianci and others, and then took the lead to drill in from below. Yue Ziyuan and others all looked at long Tianci with questioning eyes. That obviously meant asking long Tianci whether they really wanted to follow Cao Youyi in?

Long Tianci knew very well that if Cao Youyi wanted to be bad for them, he would have done it long ago. There was no need to beat around the Bush, so long Tianci nodded and pointed to the big iron gate.

Since long Tianci agreed to go in, Yue Ziyuan and others certainly went in together. In this way, the crowd crowded into the back of the iron gate, and after all the people passed, the big iron gate was closed with a bang!

At this time, Cao Youyi is smiling at long Tianci and others in the door. Obviously, he is very satisfied that long Tianci and others are willing to come in with him. Beside Cao Youyi, there are two young people with red tassels in their hands. Unlike Cao Youyi, these two young people have a serious expression and the tip of the red tassels in their hands has been pointing at long Tianci and others, It's like being ready to attack at any time!

Cao Youyi also found that the two boys were too nervous, so he raised his hand, lowered the long gun in the young man's hand on his left, pointed to long Tianci and asked, "don't you often mention him to me? Why don't you know him after seeing him for a few years?"

Hearing Cao Youyi's words, the two young people were stunned. Then the older one came to long Tianci and looked at long Tianci carefully for a long time. Finally, the wind lamp in his hand fell to the ground and his body trembled!

Another young man found that his companion was in a bad state, hurried over and asked anxiously, "hey...! what's the matter with you?"

"He... He is... Brother long Tianci...!" the stunned young man pointed to long Tianci with trembling fingers, and then stammered!

Another young man was stunned by this. Then he raised the wind lamp and looked carefully at the face of long Tianci. Later, he reacted more than his partner and jumped up in situ. However, the tunnel was not high. The boy jumped his head high and hit the roof of the cave. The boy squatted on the ground with his head in his arms. Even so, the boy was still laughing, And laugh very happy!

Long Tianci looked at the two young people with a puzzled face. Although one of them looked familiar, he still couldn't remember who it was. However, judging from the reaction of the two young people when they saw themselves, he must have something to do with the two young people!

The young man who hit his head stood up with his head covered, then turned around and ran back. His partner frowned and asked, "Hey! Why are you going?"

"I'll inform the village head and sister Yu! They'll be very happy if they know brother long is back!" shouted the young man who had run far away, and then disappeared at the corner from the depth of meters!

Looking at the young man running away, Cao Youyi smiled bitterly and shook his head. Then he continued to walk inside with long Tianci and others!

After walking for more than an hour, long Tianci suddenly felt that his eyes suddenly opened up. This secret road even leads to a mountain depression. The deep area of the mountain depression is not small, but I don't know why all the plants in the mountain depression have died!

Dead plants? Shanao? Near Xiangcheng? All this tells long Tianci where this place is. There is only one place near Xiangcheng that meets these conditions, that is, the field for planting salivary grass!

Long Tianci and others never thought that the secret road in the city Lord's residence would lead here? From another angle, the city Lord can come anytime he wants to come to this coveted grass field!

The exit is located behind a haystack on the south side of the mountain depression. If you don't look carefully, you can't find it. This position is a little higher than the bottom of the mountain depression, so you can see most of the scenes in the mountain depression. At this time, there are many large and small cracks on the ground in the mountain depression, and light black smoke is released in these cracks, which makes the air sour and smelly, It is estimated that this black smoke should be emitted!

There were originally 4000 orderly farmland in the depression, each of which was an acre of land, and all the salivary grass was planted in it. Unfortunately, at this time, the 4000 farmland was dark, and all the plants turned into coke. The whole area was silent, without green, insects and birds, and no fierce beast. The whole area seemed to become a dead zone!

Looking at everything in the depression, long Tianci and others who came out with Cao Youyi frowned. This place is too strange. What reason can make the originally vibrant depression so dead now?

Just as everyone was in a daze, a girl suddenly shouted excitedly in the distance: "brother long! It's really you! It's great that you're back!"

Hearing this sound, everyone looked in the direction of the sound, and on the other side of the mountain depression, a young girl in Lotus color dress was rushing over at a very fast speed. From the girl's face, we could see the incomparable excitement!