In the early morning of the next day, Liu Wanda and Li Xuan came to the back mountain of Wudang Mountain together. I saw Liu Wanda put his hand on an inconspicuous stone, turned it gently, and a mountain gate rumbled open. Li Xuan entered the secret room, while Liu Wanda stayed outside the secret room.

The whole secret room is made of cyan marble, about five zhang long, more than three zhang wide, there is a row of bookshelves in the dark room, there is a shelf of several bookcases before the bookshelf, there is an oil lamp on the case, the flame of the size of a bean begins to jump, emitting a faint light. In the faint light, an unopened epistle appeared on the plan.

Li Xuan walked to the plan and picked up the letter, which read "Disciple Li Xuan personally enlightened" in the middle of the letter.

"Master's letter to me?" Li Xuan was surprised. He opened the envelope and read softly: "My disciple Li Xuan:

The teacher and your father are brothers in the same sect, and they both come from the Guigu Gate. Guigumen is passed down from the Spring and Autumn Period and the Warring States Period, and the ancestor is Guiguzi. The Ghost Valley is strict in accepting disciples, and only those with extraordinary talents can enter its door. The sect takes it as its mission to conform to the general trend of the world and save the common people. Once the disciples of the sect have completed their studies, they can change the situation in the world and lead the trend of the world.

Twenty years ago, your father and I went down the mountain one after another on behalf of this generation of Guigumen disciples. I found the emperor of the Great Liang Kingdom, Xiao Milling, to assist him in achieving great things. And your father supports Li Yuan, the head of the Li family in Longyou, and plots against the world.

Ten years ago, I traveled to Taiyuan, Shanxi, and met Li Yuan, the head of the Li family in Longyou, and your father. After more than ten days of getting along, I found that Li Yuan, the head of the Longyou family, was ambitious, introverted and generous, and kind as a stream, quite the master of the world. And throughout the world, Wagang Li Mi, Luoyang Wang Shichong, and Hebei Dou Jiande are all very far behind Li Yuan. And the Longyou Li clan itself is fully prepared, and has the support of the Guanlong nobles, the largest political and military force in the world. I predict that if the world can be unified, the one who wins the Central Plains must be Li Yuan. At that time, I was disheartened, lived in seclusion in Wudang Mountain, and persuaded the emperor of the Great Liang State to hide treasures for later use.

At that time, you were only six years old, but you had the image of a green dragon, smart and clever, and you were very close to your teacher, and you loved your teacher. Your father was too busy to take care of you because he was too busy with the military to take care of you, so he entrusted you to be a teacher.

After discussing with your father as a teacher, he secretly took you to Wudang Mountain to teach the art of Guigu.

Now that the teacher is about to pass away soon, I wanted to pass on all kinds of knowledge and treasures in the secret room to you, but you are destined to have a life-and-death catastrophe at the age of sixteen. If you pass, someone will lead you into the secret room; If you can't make it, this secret room will be sealed forever and will never be seen again.

My disciple Li Xuan, the teacher and your father are no longer there, if you are auspicious and have survived the catastrophe, when you see this letter, I hope you can take the society and the common people as your thoughts, and use what you have learned to benefit the people.

The payment is Qingyun Zhenren, and the date is May 20 in the fifth year of Wude (two days before the death of Qingyun Zhenren).

After Li Xuan read Qingyun Zhenren's letter, he couldn't help but burst into tears, and the master's voice and smile appeared in front of Li Xuan's eyes. Qingyun Zhenren is amiable and respectable. The letters are full of his concern for Li Xuan, and also contain his belief that even if his life is about to end, he hopes to benefit the people.

Wiping away his tears, Li Xuan felt very depressed again. The hope of returning to the afterlife was dashed again, and the Master only let him inherit the belief of benefiting the common people, but did not give him the treasure that could return to the afterlife.

Li Xuan paced back and forth in the secret room, thinking about how to return to the afterlife. In the confusion, he casually took out a scroll of wooden tablets from the bookshelf and looked at them, on which the most primitive gunpowder and compass manufacturing were recorded, Li Xuan was very surprised, and then turned back, and actually recorded the production method of wooden kites.

Wooden kite, made by the carpenter ancestor Luban in the Spring and Autumn Period, resembles a big bird, with a hidden mechanism, people can ride, and do not fall to the ground for three days.

Li Xuan was stunned, this is the earliest plane?

Li Xuan looked at the other books on the shelf again, and couldn't help but be completely stunned. Astronomy, geography, history, and society are all-encompassing, omnipotent, especially the production of wooden oxen and horses, which is simply the earliest robot; There is also the ability to extract fierce fire oil, which is the oil of later generations. You can't underestimate the ancients, the wisdom of the ancients really surprised Li Xuan, who came from later generations.

Putting down the books in his hand, Li Xuan had a bold idea: can Datang have a machine that can return to the future by promoting the development of Datang's science and technology? In later generations, Einstein has put forward the theory of making a time machine, so can a time machine be made in Datang? As long as you can have this kind of machine, you can go back to the moment before you were reborn, and you can return to your wife and daughter. However, in order to create a time machine that can return to the next generation, it is necessary to ensure the stability of Datang and gather the strength of Datang to make it possible to make it as soon as possible. There is still a long way to go! But in the absence of a treasure returning to the afterlife, this should be the only way. I can only give it a try. When entering Chang'an this time, he must find a way to enter the power center of Datang, so that he can let the entire Datang move forward according to his own ideas and ensure the implementation of his plan. But how can you enter the power center of Datang? Li Xuan couldn't figure it out.

Li Xuan randomly took out a long-stored animal skin from the bookshelf, and when he saw the name on the animal skin, he was completely stunned.

"The Immortal System? Are there really gods in this world? Li Xuan said to himself.

After reading "The Immortal System", Li Xuan secretly said in his heart: "This is too, right?" But it's okay, with this "Immortal System", I can enter the power center of Datang. ”

Once you've figured out how to go from here? Li Xuan felt very fulfilled, and finally had a goal in life. Although it is still far away, Li Xuan believes that as long as he keeps walking down-to-earth, he will definitely succeed.

Li Xuan walked out of the secret room with a relaxed step.

Liu Wanda saw the change in Li Xuan's mentality, and knew that Li Xuan must have gained a lot, so he smiled and said, "Congratulations to Li Zhangjiao." In the secret room, Li Zhangjiao must have gained a lot. It's just that I don't know if Li Zhangjiao is interested in the treasures of the Great Liang Kingdom now? ”

When you think of your own plans, you can't do without the support of wealth. Li Xuan smiled: "Interested." How could it not be interested? Heaven will take it, and it will be blamed. That's the treasury revenue of the Great Liang State for eight whole years? How could I not be interested? ”

"Isn't it just a treasure map?" Liu Wanda laughed.

Li Xuan laughed embarrassedly, and saluted Liu Wanda with a smile on his face: "Thank you Brother Liu for telling me so many secrets and giving me so many treasures." ”

Liu Wanda said with emotion: "I am the confidant of Xiao Miao, the emperor of the Great Liang Kingdom, but the person I admire the most is your master." He is not only resourceful and knowledgeable, but also a man who truly cares about the people. I really admire his personality. I hope that you will be like your Master and make good use of this knowledge and wealth for the benefit of the people. ”

Li Xuan bowed again and said, "I will definitely obey the elder's teachings." ”

A few days later, Li Xuan, Zhao Meng, Sun Simiao, Xiong Kuohai, and Liu Wanda, escorted by Pei Xingjian's 300 Tang troops, left Wudang Mountain and headed for Chang'an.