Liu Heng thought about it and finally came up with a perfect plan: dig the secret passage along the inner side of the West Gate city wall, and then dig a large pit with a radius of more than ten zhang and two zhang in front of the secret passage, and the entrance of the secret passage is suspended in the middle of the pit wall of this deep pit.

Liu Heng said his thoughts, and let Huang Xian, Zhao Wanming, Liu Yan and other generals consider it, and everyone nodded in approval.

Lord Liu Bao arranged for Liu Si to immediately mobilize the people of Liujiabao Fort, fight at night, and dig the deep pit at the entrance of the secret passage. When the people of the fort heard that the pit was dug to prevent the Hu soldiers from entering Liujiabao from the exit of the secret road, they all enthusiastically participated.

The three personal entourages sent by Liu Heng to deliver the letter were Liu Cheng, Liu An and Liu Gang, of which Liu Cheng went west to Tielan Mountain, Liu An went south to Wancheng, and Liu Gang went northeast to Jinjiling. Among the three, only Liu Gang had to bypass the enemy camp before he could go to Jinjiling.

After the three of them came out of the secret passage, they went their separate ways. Speaking of Liu Gang alone, he cautiously rode north along the dense forest, wanting to quietly bypass the camp of Hu Bing, but who happened to run into Tuoba Jue who was searching for the secret passage of Liujiabao nearby.

As soon as Liu Gang saw that the situation was critical, he quickly stepped up and planned to rush over.

When Tuoba Jue saw that someone was about to break through, he judged that it was Liu Jiabao's meticulous work, and immediately ordered his subordinates to capture him.

Hu Bing Hula besieged Liu Gang at once.

Liu Gang drew a knife in his hand, fought hard, but was outnumbered, and was shot off the horse by Tuoba Jue with an arrow, and all the Hu soldiers rushed up, tied him up, and sent him to Tuoba Xiong's camp.

When Tuoba heard about it, he caught a fine work and interrogated it himself. Liu Gang has a blood feud with the Tuoba Department. He turned out to be a farmer near Liujiabao, because the land was forcibly occupied by the Hu people and there was a conflict, in the conflict parents and brothers were killed, in desperation to Liujiabao, became a tenant of Liujiabao, Liu Heng saw that Liu Gang was smart and clever, and took him as one of his personal followers.

In the face of interrogation, Liu Gang did not say a word. Tuoba Xiong ordered torture, but Liu Gang was not afraid, he bit off his tongue and spit out Tuoba Xiong's blood.

Tuoba Xiong was furious and ordered him to be beheaded, and was about to order the sergeant to hang the head on the high pole, but was stopped by Tuoba Hui: "Handsome and slow, Liu Jiabao may not know that we caught the sergeant who moved their rescue troops, if the head is hung out, they must think that our army already knows that Liujiabao has a secret passage, so they will prepare in advance to prevent our army from killing in the secret passage, which is obviously extremely unfavorable to our army!"

Tuoba Xiong shivered and said with a smile: "Hehe, if you see it, I almost missed a big event!"

"Dashuai, we should send someone to secretly search for the secret passage to Liujiabao, so that after finding the secret passage, we can win by surprise and take Liujiabao in one fell swoop. ”

Tuoba Xiong raised his big fingers and praised Tuoba Hui for being resourceful. He instructed Tuoba Jue to select a hundred sergeants and quietly search the place where the sergeant Liujiabao was found tomorrow to find the entrance to the secret passage to Liujiabao.

The next morning, a big pit was dug under the west wall of Liujiabao, and there was a big hole more than one person high in the pit wall on the west side of the pit, which was the entrance of the secret road of Liujiabao.

"Hey, it's good now, Hu Bing dares to come in from here, and we just happen to catch turtles in the urn." On the west city wall, Liu Heng was in a good mood, facing the rising sun slowly rising in the east, joking with Liu Yan and others.

"Congratulations to Lord Liubao, the big pit was dug so quickly, Liu Jiabao is really efficient!" Huang Xian and Zhao Wanming rushed over from the Shuai Mansion, and when they saw that such a big pit had been dug overnight, they couldn't help but praise it.

Liu Heng saw Huang Zhao and the others walking on the city wall, and hurriedly greeted them and said a few words.

Liu Heng smiled and said: "Fortunately, fortunately, the enemy army did not attack the city last night, so we can spare time to dig this big pit for Hu defense!"

"Lord Liu Bao, do you have any news from your relatives who sent the letter?" Zhao Wanming was worried about the rescue soldiers.

When it came to the matter of sending the letter, Liu Heng's face became gloomy again. Since last night, he has ordered the sergeant to keep an eye on the enemy camp to see if he can capture some information, but the sergeant's report has always disappointed him. Now there is no news of the three relatives, their fate is unknown, and there is no way to judge whether they will be able to send the distress letter.

Liu Heng shook his head and sighed: "Hey! It seems that whether or not we can move in to save the soldiers depends on the creation of Liujiabao!"

"Lord Liubao, you should let the soldiers defending the city take turns to defend the city and rest, too much fatigue is not beneficial to defending the city and rejecting the enemy!" Huang Xian saw that Liu Heng was worried about sending the letter, so he deliberately diverted the topic.

Liu Heng nodded yes, and instructed his personal followers to spread the word to the soldiers all over the city wall to pay attention to rotation and rest.

Huang Xian looked at Liu Heng's tired appearance and persuaded: "Lord Liu, you have been tired all night, go back to the Shuai Mansion to rest, with me and Miss Zhao here, nothing goes wrong here!"

Liu Heng was indeed tired, and when he saw Huang Xian say this, he told them a few words and went back.

"Brother Huang, why is the Hu Bing camp so quiet today, is there any trick they have?" Zhao Wanming looked at the enemy camp and asked his own question.

"Brother Huang, look, there are people in the woods in the west!" Before Huang Xian could answer, Zhao Wanming discovered a new situation.

Huang Xian's eyes took a closer look into the woods, and he saw that there were many people trying to find something everywhere.

"Ahh ”

Huang Xian immediately ordered dozens of sergeants to be responsible for monitoring the movement of the entrance to the secret passage in the big pit on the inner side of the city wall, and if any enemy soldiers entered, they would immediately open their bows and arrows.

At noon, Tuoba rushed back to recover his life, reporting that the entrance to the secret passage had been discovered.

Tuoba Xiong was overjoyed, and finally suppressed his excitement, and waited patiently until dark. He ordered Tuoba Jue to lead 200 men and horses, from the entrance of the secret passage quietly into Liujiabao, after entering the city, the first thing to open the city gate is, to answer himself and Tuoba Huai, Tuoba Qi and Tuoba Hui, then the four people and horses will rush into Liujiabao together, kill him a chicken and dog.

In the evening, it was Liu Heng's turn to guard the city, and he was patrolling along the city wall, when he suddenly heard a popping sound from the inside of the city wall not far behind him, followed by the neighing of people and horses and the wailing of arrows in men and horses.

"The enemy army is sneaking up from the secret passage!" Just because he had been on guard and knew that the enemy was coming, Liu Heng's heart was full of excitement, and he hurriedly led people to the city wall on the side of the entrance of the secret passage.

Under the reflection of the torches, I saw five or six cavalry falling into the deep pit of the secret passage entrance, the men and horses were hit by countless arrows, the blood on their bodies was bubbling up, lying at the bottom of the pit to struggle for their lives, the sergeants were shooting arrows at the entrance of the secret passage, and there were sporadic arrows shooting out at the entrance of the secret passage, mixed with the screams of the cavalry when they were hit by arrows, and after a while, the entrance of the secret passage was restored to calm, and it was obvious that the Hu soldiers had withdrawn.

Liu Heng was overjoyed and praised the sergeants who monitored the entrance to the secret passage and the anti-Hu deep pit, and encouraged them to continue to fulfill their duties.

When Tuoba Xiong learned that the men and horses who attacked Liujiabao from the secret passage were defeated and retreated, he was so angry that he gritted his teeth. He could no longer bear it any longer, and ordered all men and horses to immediately and forcibly attack the city.

The two sides engaged in a tough battle of attack and defense. There are plenty of bows and arrows on the city wall of Liujiabao, as well as the bricks and stones of men, women and children in the fort who are constantly transported to the city wall. Although the Hu soldiers continued to attack the city, one wave passed, and another wave came, they still could not attack the city wall of Liujiabao.

For more than ten days, both sides were tormented in high-intensity offensive and defensive battles.