In the evening, Li Yu, the son of heaven, once again secretly met Guo Song in the back house of the imperial trading house.

Li Yu was wearing an ordinary regular clothes, with a little makeup, and became an ordinary person, even if he walked to the gate of the palace, the guards might not be able to recognize this as the owner of the palace.

Li Yu seemed a little worried, and hesitated for a while before saying to Guo Song: "Yu Chaoen has eight inner studyes, one of which is in front of a hundred-year-old locust tree, which is very remote, and Yu Chaoen rarely goes there.

But there is a secret room hidden in this very inconspicuous study, built underground, the passage of the secret room is behind the bookshelf, there may be some switch on, but I want to tell you, there are twenty-four copies on the ground in this passage, and when you step on it, people will fall, and there is a gun pit below, and you will definitely die, even if you don't step on the flap, step on the solid board or touch the wall, hundreds of dense poisonous arrows will shoot out from the holes in the walls on both sides, and it will be difficult to escape death. ”

"But the passage is so well defended, how can Yu Chaoen himself get in?" Guo Song couldn't help but ask.

"That's a good question!"

Li Yu smiled faintly, "Ten zhang outside this study, that is, there is a door in another study, the door is cast with thousands of catties of pig iron, and the key is hung on Yu Chaoen's neck all the time, and that door is where Yu Chaoen enters the secret room, and the dead door of the study is specially reserved for people who are worried about his secret room." ”

"Holy!"

Guo Song scolded secretly, there was actually a difference between the door of life and the door of death, "Your Majesty, does Yu Chao Enke have a time to take the key off?" ”

Li Yu shook his head, "There has never been, but what I mean, you still have to go through the door of death, as long as you can get by, the door of death can also lead to the secret room, that is the way of escape left by Yu Chaoen for himself, and the mechanism in the passage can be turned off in the secret room." ”

Guo Song knew that Li Yu still had something to say, he stood aside and listened quietly, in fact, he wanted to know how Li Yu could know these secrets, but the other party was the emperor! The emperor always had sources that he did not know to ordinary people.

Li Yu glanced at Guo Song, saw that he listened attentively, and was very satisfied, and continued: "The only way to enter through the passage of the study door is to fly through the air without touching the wall or the ground, but it is impossible for a person to fly ten zhang away, and a rope must be pulled........

After Li Yu finished talking about the structure of the secret room, he said to Guo Song: "There are two holy decrees left by the emperor in the secret room, I will give you two days, be sure to take out these two holy decrees, the stakes are very important, as long as you succeed, I promise to upgrade you to a knighthood." ”

The eyelids of Aunt Gongsun next to her jumped suddenly, and then she was promoted to a marquis, and she was the same as herself, she worked hard for 20 years to get this title, Guo Song has only been a few months?

Although Aunt Gongsun felt a little sour in her heart, she was still happy for Guo Song, after all, she was her nephew, and she knew in her heart that this task would never be completed.

Guo Song knelt down on one knee and said, "The minister will definitely not live up to His Majesty's trust." ”

Li Yu was overjoyed in his heart, he took out two scrolls and handed them to Guo Song, "This is a fake, after taking the true holy decree, put the fake holy decree back into the distance, and there are many rare treasures in the secret room, you don't move, after killing Yu Chaoen, the things in the secret room are up to you to choose." ”

"The minister is measured, and he will not tamper with anything."

Li Yu said again: "Early tomorrow morning, Yu Chaoen is going to the Shence Army barracks, he is not in the mansion, this is your chance, I hope you can succeed, and the special equipment you need, your aunt will provide you." ”

Guo Song nodded, "Weichen will sneak into the Fish Mansion tonight." ”

Li Yu sighed slightly: "This mission has been prepared for five years, and many candidates have been considered, but it is really because this mission can only succeed and cannot fail, so I have endured it for five years, and it was not until you arrived that I made up my mind." ”

.........

That night, Guo Song sneaked into Yu Chaoen's mansion from the northwest corner of the fish mansion, Yu Chaoen lived in the east courtyard, and the northwest corner was the lower room, which belonged to a low-status remote place, there were basically no guards here, and there was a long alley in the northwest corner, and on both sides of the alley were dense houses, where nearly two hundred rough servants of the fish house lived.

Guo Song was dressed in a black samurai suit, lying on the roof, on the other side of the roof is the guest house, where many literati lived, and Yu Chaoen was also a vassal of Yu Chaoen, raising a group of literati to sing praises to him all day long.

This group of literati lived in the west courtyard, and at this moment they were gathering together to drink, laughing constantly, and it was particularly lively.

There was no patrol in the west courtyard, but there were more than a dozen warriors and a few mastiffs in the corridor outside the west courtyard wall, Guo Song passed through the west courtyard, and crawled along the ridge of the roof, jumping over several large houses in a row, and he finally landed on a roof on the west side of the inner house, next to a century-old tree, this room is Yu Chaoen's most remote study, and Yu Chaoen's secret room is hidden under this study.

Perhaps in order to give people the illusion that it was not important, there was not a patrol guard around the study, Guo Song observed for a long time, and was sure that there was no patrol, so he turned over lightly.

.........

Early the next morning, Yu Chaoen left the mansion under the strict escort of a hundred samurai and went to the camp of the Bashang Shence Army.

When the horn sounded, Guo Song immediately fell from the beam, and he slept on the beam all night, waiting for Yu Chaoen to leave.

Take out a very heavy bow from the bow bag, this is a pair of copper tire iron back bow stored in the palace, the entire auxiliary bow is made of pig iron, even the bowstring is a steel wire string, it is a pair of six-stone bows, and few people in the entire Tang Dynasty can pull it.

The arrows are three iron arrows, and the bow and arrow plus the black sword weigh at least sixty catties, and it is also because of ten years of weight practice on the cliff that Guo Song can carry them on his back.

He had found the mechanism behind the bookshelf last night, it was deliberately designed to be obvious and easy to find, and he flipped the switch, only to hear the sound of 'Click!' from behind the bookshelf. With a bang, he gently pushed the bookshelf, and the door attached to the bookshelf was slowly opened, revealing a passageway.

The reason why Guo Song chose the daytime is not because Yu Chaoen wants to leave during the day, but because of the light, he must light up at night, and he can see the light outside the lamp, but he doesn't use it during the day, although the passage is a little dark, but Guo Song can still see it clearly.

The passage is made of bluestone, and the four walls are polished very smooth, but the bottom and sides are false boards, and if you take a few steps, you will fall down the deep pit, and even if you don't climb down, you will be shot by the powerful crossbow arrows hidden on both sides.

Guo Song stood at the mouth of the passage and took out an iron arrow, the tail of the iron arrow was pierced with two thin long ropes, this long rope is also a collection of the palace, I don't know what material is made of, it is extremely tough.

Guo Song took the iron arrow, his arms competed, and he squeaked and opened the strong bow, this kind of six-stone copper-tired iron arm bow, he could only pull it twice at most.

Finding the right feeling, as soon as the hand was released, the iron arrow 'whoosh!' Ground shot at the target.

He aimed for the tiny gap between the two large bluestones, and with a click, the iron arrow shot into the gap and was firmly nailed to the wall.

He turned around and had another arrow, but the second arrow was shot at the wall of the study, the iron arrow was deeply nailed into the opposite wall, and it was not half of it, he firmly tied the rope to the two iron arrows, these two arrows need to pull away the six-stone iron bow, and nail it to the bluestone gap ten zhang away, not only need extraordinary archery, but also need strong arm strength, Li Yu never found a suitable candidate, and waited for five years until Guo Song arrived.

With these two arrows alone, I'm afraid that no one else in the entire Chang'an can do it except Guo Song.

Guo Song put on deerskin gloves, gently climbed the rope, the rope sank down, about a foot from the ground, he climbed the rope slowly forward, big drops of sweat rolled down from the sideburns, this is also a huge test, Gongsun Aunt once took the school exam, no one can do it, even Yang Yu, who has slept on the rope for more than ten years, can't do it, he only climbed the rope and walked ten steps, which is the best result of the Hidden Sword Pavilion.

If Guo Song hadn't practiced jumping off the cliff for ten years, he wouldn't have been able to do it, this short distance of ten zhang long, Guo Song climbed for half an hour, the door was locked from the inside, and he kicked it open, and there were dark steps below.

Guo Song jumped up to the steps, lit a fire breaker, found the handle to close the mechanism, and pulled it down hard, only to hear a sound of the mechanism, and soon it was quiet again.

Guo Song immediately took out the third iron sword and turned around and threw it towards the aisle, the iron arrow rattled, and the floor did not turn, he threw the thirty-pound iron bow again, the floor still did not turn, he breathed a sigh of relief, and he could go back directly from here later.

Guo Song closed the door, lit a candle, and slowly walked down the spiral stone staircase with the candle in hand.

Walking out of the stone staircase, a secret room suddenly appeared in front of him.