Crack! Crack!... A few sounds suddenly came from above. Xiahou Yuan's heart moved and he quickly retreated. Almost at the same time, a loud rumbling sound came from above. The entire tunnel was as if the sky had collapsed. In an instant, the passage I had seen just now was completely blocked by the earth and rocks that collapsed from above! Dozens of people and the rebellious soldier were all buried under the heavy earth and rocks. It was naturally impossible to survive!

Xiahou Yuan was shocked and angry, worried that the tunnel would collapse again, so he urgently ordered the officers and soldiers to withdraw quickly. The order was passed down quickly, and two thousand elite soldiers hurriedly retreated, and after a while, all of them left the tunnel.

Not long after, an officer rushed to Cao Cao and reported: "Reported to the lord, our army entered two tunnels, and the two tunnels suddenly collapsed. General Zhao Laosheng and more than a hundred officers and soldiers were pressed down!"

Cao Cao was shocked and asked hurriedly, "How could this happen?" The officer shook his head and said he didn't know. In fact, the reason is very simple. The tunnel naturally would not collapse on its own for no reason. This is a response measure that Lu Bu's army had long arranged. Ordinary soldiers do not know that only the officers above the commander know that there is not only one secret whistle not far from the entrance of each tunnel, but two. The second secret whistle hides in a more hidden place, and their role is more important. Once these secret whistle receive orders or find that the situation is wrong, a mechanism will be activated immediately, which is a flip plate above the tunnel. The flip plate is usually fixed.

As long as a pin is pulled out, the flap will fall down immediately, and the earth and stones placed on the flap in advance will suddenly lose support and pour into the tunnel. Although the soldier knew the entrances to the two tunnels, he did not know that there was a secret whistle and a earth and stone mechanism because of his insufficient position. When he took Xiahou Yuan and others to get rid of the first secret whistle, the second secret whistle hidden not far away immediately discovered that something was wrong, so he quickly activated the mechanism. In an instant, more than a dozen squares of earth and stones poured down from above and crushed dozens of people! Xiahou Yuan's reaction was still fast enough, otherwise he might have been crushed to death under the earth and stones!

Cao Cao thought of Xiahou Yuan and said anxiously: "General Xiahou is fine, right?"

"General Xiahou is fine. He is commanding the officers and soldiers on the scene to re-diggle the tunnel."

Cao Cao thought for a while and immediately said, "I'll go and have a look." As he said that, he ran under the city wall. Everyone hurriedly followed him when they saw this.

Not long after, Cao Cao rushed to the scene under the support of thousands of iron-armored guards. Xiahou Yuan was meeting his subordinates to clear out the gravel and soil in the tunnel. Seeing that Cao Cao was coming, he hurried forward to pay homage to him: "Prime Minister!" Cao Cao asked: "How is the situation?"

Xiahou Yuan said with annoyed look: "It's really God won't help me! Seeing that the enemy's gathering place was right in front of him, the tunnel suddenly collapsed! At this moment, the enemy must have been alert!"

"Where is the soldier with the avatar coming?"

Xiahou Yuan pointed at the authenticity and said, "I have been buried in it with dozens of people under my command. I guess they are in danger!"

Cao Cao frowned and patted Xiahou Yuan, "Take it slow. Since they know they are hiding underground, they don't want to run away." After thinking for a while, he asked, "Do you know the way you are walking?" Xiahou Yuan immediately pointed to a courtyard behind the donkey shed, "It should be extended to the courtyard there. By the way, the assembly ground seems to be under the courtyard." Cao Cao smiled and immediately ordered the commander to pass on the order.

Two thousand officers and soldiers were transferred, and then pointed to the courtyard over there and said to the two thousand officers and soldiers: "You go to that courtyard and divide it into two teams, one is divided into two parts, one is alert, and one is digging down. The second team searches everywhere, and maybe there is an authentic entrance and exit hidden in the courtyard." The two thousand officers and soldiers responded and rushed into the courtyard immediately, and then they started busy, digging, searching, and a lively scene.

After more than two hours, the sky gradually turned white, the night finally passed, and the earth quickly brightened.

Cao Cao was lying on the city gate tower to rest. He had been busy all night. He was very tired and snored. Xiahou Yuan was still commanding the cleaning of the tunnel on the spot. Suddenly, a wave of shouts came from the tunnel. An officer who was staying at the entrance of the tunnel rushed to Xiahou Yuan and reported with joy: "General, the tunnel is clear!" Xiahou Yuan was overjoyed, grabbed his big knife and led hundreds of elite troops into the tunnel. He rushed to the front, and the earth and rocks that had originally blocked the tunnel were basically cleared. Xiahou Yuan was happy and saw a group of soldiers crowding not far ahead. Countless burning torches illuminated the four walls of the tunnel. Xiahou Yuan felt strange and quickly stepped forward and asked loudly, "What's going on?"

When the officers and soldiers heard Xiahou Yuan’s shouts, they turned around to pay their respects. The leading officer immediately said: “General, the front is blocked by many earth and stones!”

Xiahou Yuan frowned and walked forward. The officers and soldiers made way. Xiahou Yuan came to the end and saw countless earth and rocks blocking the tunnel and stuffing them in front of him. He was immediately annoyed and scolded: "Are these people all rats?"

The officer asked with his fists, "General, what should I do now?" Xiahou Yuan looked thoughtful, and he didn't know what to do for a moment. Although he had been experienced on the battlefield for a long time, he had never dealt with his opponent underground. Facing the authenticity in front of him, he really felt like a mouse was helpless in pulling a turtle.

At this time, another officer rushed over from outside and clasped his fists and said anxiously: "General, the officers and soldiers who dug the courtyard have dug their tunnel!" Xiahou Yuan was overjoyed, and immediately came out of the tunnel and headed straight into the courtyard not far away. When he arrived at the work site, he saw a large pit several meters square in the middle of the huge courtyard, and countless soil and rocks were piled up around to form a huge circle. At the bottom of the pit, there was a round hole one meter square, dark, as if leading to a deep underground.

"When did it be dug through?" Xiahou Yuan asked.

An officer at the scene immediately clasped his fists and said, "I dug it through just now."

"Has anyone gone down?" "Not yet."

Xiahou Yuan walked carefully to the edge of the round hole at the bottom of the big pit, and dozens of officers and soldiers couldn't help but gather up. Xiahou Yuan looked below the black hole, and could not see anything. Xiahou Yuan frowned and shouted, "Torch." An officer immediately handed over a torch. Xiahou Yuan took the torch and threw it into the black hole. The torch fell down and fell to the ground and was still burning. Under the flashing flames, everyone saw that there seemed to be a hall below. Xiahou Yuan felt that the place below should be the gathering place that the soldier said before. Xiahou Yuan was very excited and immediately asked someone to bring four ropes, tied them to the surrounding tree trunks, and then hung the four ropes into the hole.

Xiahou Yuan also asked the officers and soldiers to throw more than 20 torches into the cave, and then ordered fifty death-death men to enter the cave first. Fifty death-death men bit the ring-headed sword and carried the shield on their backs, and pulled the rope into the cave one by one. Everyone looked at them nervously, but after all the fifty death-death men went down, they were not attacked. The people outside the cave couldn't help but breathe a sigh of relief, and Xiahou Yuan asked loudly: "What's going on next?"

One person whispered: "It's a big room, but there isn't one. Huh? What's this?"

Xiahou Yuan frowned and asked, "What's wrong?"

"Why is there so much water on the ground?! No, this is not water! Go quickly!"

At this moment, the Cao army officers and soldiers outside the cave suddenly saw a sudden lit up in the cave, and the flames rushed out of the entrance of the cave. The officers and soldiers standing near the entrance of the cave saw that the flames filled the entire cave hall in an instant. The fifty death-death men were trapped in the sea of ​​fire and screamed, rushing to climb up through the ropes! The people outside the cave hurriedly helped, dragging seven or eight people up. Almost everyone was covered in flames when they were dragged up! The people around them quickly helped put out the fire! When they went to the entrance of the cave, there was no sound below. There were dozens of people lying in the sea of ​​fire, and waves of burnt smell rushed out! Everyone was shocked and angry, and some officers and soldiers couldn't help but curse!

...

Cao Cao stood on the city wall and looked into the city, frowned slightly.

Xiahou Yuan rushed up, knelt down on one knee, and said with shame and indignation: "Prime Minister, the last general is incompetent, and he has damaged dozens of brothers, but he has not even touched the other party's tricks!"

Cao Cao helped Xiahou Yuan up, patted him on the shoulder, and smiled and said, "There is nothing to worry about! We even occupied this city, and now we are just some mice hiding in this city to make trouble for me! Sooner or later, we will pull them all out!" Xiahou Yuan couldn't help but recover a lot of confidence when he heard this.

"There are enemies!" "Hurry!"... A chaotic shout suddenly came. Cao Cao and others quickly looked in the sound and saw a fierce battle in a street facing north of the city from afar. Xiahou Yuan hurriedly said, "I'll go and see!" Then he picked up his big sword and ran down the city wall.

Cao Cao and others looked at the street, and saw their officers and soldiers rushing into the houses on both sides, and the sound of fierce fighting came. However, not long after, the sound of fighting stopped. Cao Cao couldn't help but frown slightly. Xun You and Liu Ye all showed a look of concern.

Not long after, Cao Cao and others saw Xiahou Yuan reaching the scene. Not long after, Xiahou Yuan led a dozen cavalrymen toward him.

Xiahou Yuan rushed to the top of the city and came to Cao Cao. He clasped his fists with annoyance and said, "Prime Minister, the enemy ambushed us just now, and more than 200 people died. There must be entrances and exits of the enemy tunnels on both sides of the street! This kind of battle is so furious!" Cao Cao laughed and scolded: "This bastard Lu Bu actually came up with this method! It's so hateful!"
Chapter completed!