On the wall of Yanmen, more than 20 soldiers who were keeping watch at night were already kneeling on the ground, all of them with fear on their faces, but they did not dare to beg for mercy. And beside them, the old Guan had fallen to the ground, and black blood was oozing out of his mouth and nose, which was actually poisoned, which made Sun Tutian Boyuan and the others in front of him also tighten their eyebrows and look solemn.

When Shicai led people to seize the stolen goods of this Liao State spy, they still had a sense of relief, but they never thought that they would just blink an eye, and when they fell into the control of Lao Guan, their bodies twitched, their faces distorted, and they were silent in a moment, and they didn't even have a chance to ask Sun Tu. Obviously, this guy hid a poison sac in his mouth early in the morning, and once he was identified and caught, he did not hesitate to commit suicide.

And the movement here also quickly alarmed the night vigil soldiers who were still roasting the fire in the arrow tower, and when they heard the sound and rushed out, after seeing that it was actually Tian Boyuan who brought people to arrive, they were naturally weak for a while, after all, they were suspected of being lazy by staying in the arrow tower to bake the fire. And when they saw the dead Lao Guan, and then knew the identity of his Liao people in general, they were even more frightened and almost scattered. If this makes people suspect that they are also Liao spies, or have some collusion with them, not only will their heads be difficult to protect, but even their families will be implicated by it.

In such a situation, they can only kneel and admit their mistakes, and then repeatedly say that they are innocent. However, Sun Tu really didn't suspect them, just looked at Lao Guan's corpse, and then looked at them and asked, "On the fourth day of the first month of this month, on the twenty-first day of the last month, on the sixteenth day, which of you will keep vigil here?" ”

When a few people heard this, they quickly thought about it carefully, and then a few people said in a loud voice: "Small, the little one will keep vigil on the closed city on that day." ”

"What about him?" Sun Tu tapped Lao Guan's corpse on the ground: "Is he present, and has he left you for some reason, just like tonight?" ”

At this time, Tian Boyuan and a few of them quickly understood Sun Tu's intentions. The former only recalled for a while, and then nodded one after another: "General Hui, he was indeed present in those days, and just like today, he said that he was going to go to facilitate Zeng to leave for a while." ”

"Also, it was Xiao Qu who came to keep vigil today, but because he got the wind cold, he was replaced."

Sun Tu glanced at Tian Boyuan, who nodded in agreement. The three days mentioned by Sun Tu just now were the times when the soldiers and horses went out to suppress those Liao cavalry, so it can be confirmed that the reason why the Song army swooped down again and again was because this guy passed on such important news.

This made Tian Boyuan even more angry, and he couldn't wait to step forward and kick the corpse a few times to get angry. However, Sun Tu seemed quite calm, and suddenly ordered: "Come on, go and see what else he has on him, and in addition, send someone to his residence to look carefully to see if there are any clues." ”

The soldiers on the side were all defenders in the pass, and they were still a little hesitant when they heard Sun Tu's orders, but after Tian Boyuan nodded, he hurriedly responded with his fists in his fists. At the same time, he said: "Take these people down and watch them carefully." "It's the soldiers who are with Lao Guan, although he also believes that these people are innocent, but the process that should be taken still has to be followed, at least these people will not be able to go to Guancheng for a long time.

"How can this be so, is this guy so determined? As soon as he was taken down, he committed suicide by taking poison. After a long while, Tian Boyuan sighed with some surprise, the impact of the scene just now on him was not small.

"It seems that this person should be a real Liao person, not a small person who was bought by them just to deliver news." Sun Tu was much calmer and thoughtful. In fact, this is also understandable, although Lao Guan is only the most inconspicuous pawn in Yanmen Pass, but his role is really not small, at least every key news should be delivered by him. And if he was a higher-status general or something, it would really be impossible for him to go up to the city wall as easily as he would.

At this time, the soldier who searched him had already stood up and reported: "Two generals, there is nothing else on him except a wooden waist card." But he found nothing.

But this was also expected by Sun Tu, and there was nothing to pity, so he nodded. However, Tian Boyuan was a little puzzled and said: "If it is really as General Sun said, he is a Liao man, then the price is not small." As far as I know, this guy has been in my Yanmen Pass for five or six years, and he hasn't behaved anything unusual in the past, is it just for this incident? ”

"It's just a volt at the beginning, isn't it going to come in handy now?" Sun Tu glanced at the corpse: "If it weren't for him, we wouldn't have today's predicament in Yanmen Pass." But there is one thing that I still think is problematic, he should not be the key target we want to dig up, but he is dead, and I can't ask anything more from his mouth. ”

Tian Boyuan nodded: "Yes, he is just an ordinary soldier, it is impossible to know the specific situation of the movement of troops and horses in my pass, and it is impossible to even know the route of the grain team and inform the Liao people outside." ”

"And ordinary soldiers, even spies, can't be literate, so if you want to know the identity of the person behind it, you have to fall on this thing." Sun Tu said, and shook off the cloth full of words on his hand, and what was written on it was a man, not a Khitan script.

"yes, maybe through this handwriting, I can find out the identity of the person behind the scenes." Tian Boyuan was refreshed when he heard this, and quickly took the cloth from Sun Tu's hand, and went to the fire to look at it. However, he was just a big old man, he didn't know a few words at all, let alone recognize any handwriting, he only looked at it for a long time, and he couldn't see the reason, so he could only hand it over to Sun Tu again: "General Sun, can you see any clues?" ”

Sun Tu also smiled bitterly and shook his head: "I can't do this, not to mention that I really have a heart, it's not difficult to cover up my handwriting after all." Therefore, the only thing that can be known from this word is that the person behind it must be literate and hyphenated. ”

"This is too uncertain, although most of the people in Guanzhong are illiterate Qiu Ba, but there are also many people who can write and calculate......"

"Then what if you add someone who can accurately grasp the important tasks of military aircraft such as the movement of troops and horses and the transportation of military rations?" Sun Tu hurriedly said what he meant, which made Tian Boyuan have some eyebrows: "If you say this, the ordinary officials in charge of logistics affairs can be ruled out, only the three or five counselors are the most suspicious, and the other is the ......."

Seeing that he looked embarrassed, Sun Tu helped him say: "And the prison soldier Du Changguo, presumably you won't hide any decision from Guanzhong, right?" Moreover, what put Yanmen Pass in the current predicament was also due to his suggestions and persistence. "That's exactly the case...... Tian Boyuan took a deep breath, and then nodded: "It's just that we don't have other evidence." That's a six-grade civil official, but it's not something that he can handle at will by a guard at Yanmen Pass.

However, Sun Tu didn't have so many worries, but said with a cold face: "The matter is big, in order to prevent the Liao people from taking advantage of it, we must start taking people as soon as possible." As for the evidence clues or something, it is not too late to search in his room when I see him. "He even dares to kill a big man like Gao Yu, how can he care about a mere prison army?

Seeing that Tian Boyuan was still hesitating, Sun Tu said solemnly: "General Tian, the military situation is like fire, but we can't afford to look ahead and look back." Now that there is such a disturbance in the city, it will soon be known to many well-intentioned people, and then I am afraid that even the evidence will not be found. And everything is up to me, and it's also my idea to arrest Du Jianjun......"

"What General Sun said is that it is a matter of my Yanmen's safety, even if there are consequences, I can't take care of it. You are the guest and I are the master, and all the freedom here is taken care of. This Tian Boyuan was also a little bold, and immediately made a decision, and while rushing down the wall with Sun Tu, he had already quickly ordered his personal guards to go over with him to take people.

Sun Tu fell behind and saw this, and his eyes also showed a little appreciation. It is said that the border army is much stronger than the armies in other parts of the Great Song Dynasty, and he may have been a little skeptical before, but now he believes it. From this Tian Boyuan alone, it can be seen that their confidence is indeed much stronger than that of other generals, at least they still dare to fight with those high-ranking civilian officials.

￥￥￥￥￥

Hundreds of miles away, the Song army camped.

Two or three hundred thousand horses spread out, and it was really completely sky-bound, boundless, even the bonfires at night were enough to reflect the stars in the sky.

Different from the laxity of the night patrol soldiers in Yanmen Pass, the patrol soldiers and horses here are constantly coming and going, never letting go of a gap, only when someone comes to report tonight's password, and show the portable waist card, can pass through the layers of defense, and after changing the password many times, they can come to the largest military tent in the middle of the barracks.

Qin Dang, who was stocky and shrewd, hurriedly came to the front of the tent, looked at the lights that were still shining in the tent, and immediately whispered: "The last general Qin Dare has something to report to Tong Shuai." "There is also a team of more than 100 guards in front of the tent, and if you don't have the permission of the people inside, whoever dares to approach will definitely be killed.

Tong Guan's slightly hoarse voice soon came from inside: "It's Zizhong who is here, come in and talk." With this sound, the two guards in front of the tent door took a step back and made a gesture of invitation to Qin Dang, and one of them even helped him lift the curtain of the tent, so that he could enter without bending down and moving.

Qin Dare nodded at them slightly, and then stepped into the warm Chinese army tent. Tong Guan was looking at a military report at this time, and he didn't dare to disturb in a hurry, so he could only stand still. After a while, I saw the other party put down the Chinese book in his hand and raised his eyes to sweep: "How is it, but has the matter in the rear been concluded?" ”

There was a fork in the army's rations, even if the people sent by Yanmen Pass were like stones sinking into the sea, the front line still had already realized it, and Tong Guan had already sent someone to investigate it carefully, and the person in charge of this matter was Qin Dang, who came late at night.