In the 358th year of the 10,000 calendar, the 100,000-strong army of the Hu State invaded the Longliang State on a large scale, and the Hu people were brave and good at fighting, brutal and unkind, and quickly occupied a prefecture and five counties. The Beiting Festival of Longliang Kingdom made Mu Kang be ordered to lead 80,000 elite soldiers to resist.

Mu Kang was forty years old at the time, he practiced martial arts since he was a child, his strength was endless, his martial arts were strong, his mind was outstanding, he was known as "the handsome golden sword", and was deeply loved by the people. The eighteen guards of the clouds under his command are even more famous! They are as fast as the wind, as fierce as fire, and everywhere they go, not a single grass grows!

After three years, he regained the lost territory and pursued the Hu people for 800 miles. Emperor Hu was forced to sign the terms of ceding the land of two prefectures and twelve counties, and bowed to the Longliang State, which pushed Mu Kang's prestige to the peak for a time.

In the year 360 of the 10,000 Yuan calendar, great changes occurred in Xuanque Prefecture, and the Governor's Mansion was bloodbathed overnight, and no one in the Mu Mansion was spared. When they were discovered, Mu Kang and his wife, who was about to give birth, were all lying in a pool of blood, and even the famous Eighteen Guards of Youyun were all killed in battle!

It is rumored that Hu sent people to secretly attack to avenge the humiliation of the defeat that year, and then the Hu envoy said that it was not them, and they did not have the ability to slaughter the "Golden Sword Shuai" Manmen and Youyun Eighteen Guards, in order not to affect the relationship between the two countries, the Mu Fu case has since become an unsolved case. In order to commend Mu Kang's military exploits during his lifetime, the emperor of the dynasty posthumously named him "the prince of Zhenguo".

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In Jingyuan Town, Shuozhou, in a simple courtyard, a thin figure was beating a wooden stake taller than others, and a withered old man next to him sat in a wooden wheelchair and said a few words from time to time. The autumn wind brought up a few yellow and red maple leaves, which fell lightly to the ground, the old man's robe swayed with the wind, and his waist was actually empty, and it returned to its original state in a moment.

"Hey!hey!hey!"

A child dressed in sackcloth about five or six years old was sweating like rain and constantly hitting a very inconsistent wooden stake, a few strands of hair sweat sticking to his forehead, a pair of eyes were bright, his gaze was resolute, and a pair of small hands were red, but he did not react like an ordinary child.

The old man looked at the child with a kind smile, stretched out a hand and beckoned to the child, this hand did not seem to look like an old man's hand, the skin was tight, strong and powerful, and there was a scimitar tattooed on the wrist, which was very weird.

The child took a deep breath and walked up to the old man and said, "Grandpa Mu"

The old man stretched out his hand and touched the child's head and said, "Yun'er, do you want to go out to play?"

The child shook his head and said, "The chrysanthemums in the east are blooming, and there are red maple leaves all over the mountain, I want to push Grandpa Mu to take a look."

The old man looked at the child kindly and said, "When?"

The old man's answer made the child overjoyed, and the child was a little excited: "Shall we go now?" The stone said that there are many caterpillars on the maple leaf, and you can step on several of them with one foot...... The child suddenly stopped talking, and was very sensitive to words such as "stepping".

The old man just looked at the child with a smile and said, "Go by yourself! Grandpa Mu has other things to do, you can call the stone and go play together!"

The child looked at the kind old man and then looked out of the courtyard and said, "I'll be back early!" The old man looked at the lively figure in a daze, and suddenly lost it.

The child's name is Mu Yun, and he has lived with the old man since he was a child, and he is intimate and dependent on each other. Mu Yun has been with the old man since he can remember, and the neighbors around him call him Lao Mu, and no one knows the old man's full name. Lao Mu knows a lot and knows a lot.

Since Mu Yun was four years old, he has trained Mu Yun in various skills every day, such as literacy and reading, etiquette and upbringing, and martial arts. Lao Mu rarely goes out to socialize with people, and almost all of his energy is focused on Mu Yun. And Mu Yun likes to listen to Lao Mu talk about strange people and strange things, and he is full of yearning and curiosity about the outside world.

Jingyuan Town is a remote town in Shuozhou, close to the border, where it is poor and backward, and the people are simple, and almost no one can write. Lao Mu is a special case in the town to walk alone, literate and medical, the people in the town are very good to Lao Mu and Mu Yun, after all, who hasn't been sick yet?

"Hey, the Hu people have recently been harassed in Shuozhou again"

"That's no way, the court doesn't care, it's still us ordinary people who suffer, if the golden knife is still there, how dare Hu Ren do this?"

"yes!"

Under the tree. The two of them were talking, Mu Yun and Shi were playing under the maple tree, Mu Yun raised his head and asked, "Uncle Liu, that golden knife is so handsome, why don't you come back?" Shi Shi, who was the same age as Mu Yun, was still happily turning over the maple leaves.

One person sighed and said, "The golden knife handsome will never come back."

Shi said: "Muyun, let's go to the river to catch crabs"

"Yes!" the two of them scurried towards the river.

"Grandpa Mu! Grandpa Mu, let's see what's wrong with Mu Yun?" Shi ran into Mu Yun's house panting with Mu Yun on his back.

Lao Mu looked at Mu Yun, who was motionless, frowned, and then said to the stone: "It's okay, little stone, Mu Yun is too tired and asleep, you should go home quickly, otherwise your father will look for you again."

Shi nodded ignorantly, turned around and ran home, Lao Mu picked up Mu Yun horizontally, turned the wooden wheel and moved towards the house.

Mu Yun's breath was as usual, as if he was asleep. Lao Mu pinched Mu Yun's pulse, frowned, and said to himself, "Why is it ahead again?" After that, he helped Mu Yun up with both hands and wiped Mu Yun's body.

In the early morning of the next day, Mu Yun slowly opened his eyes and saw that Lao Mu was looking at Mu Yun in a wooden wheelchair, Mu Yun said, "Grandpa Mu, am I asleep again?"

Lao Mu nodded, Mu Yun knew that he would faint inexplicably once every half a year, but this time it didn't seem to be half a year.

Mu Yun got up and slowly pushed Lao Mu into the small courtyard, one old and one young were silent among the slowly falling maple leaves, and after a while, Mu Yun said: "Grandpa Mu, is it that one day Yun'er will always fall asleep and not wake up?"

Lao Mu looked at the maple leaves in the garden for a long time and didn't speak, Lao Mu remembered what an old man in a robe said to himself on a snowy night five years ago: "This child was injured in his mother's womb, and it is fortunate that he can be forcibly saved, but he will not live to be ten years old, hey!" he shook his head and disappeared into the snowstorm.

Lao Mu remembered that terrible night, with rivers of blood and corpses all over the ground, he could only sigh silently in his heart, and then turned his head and looked at Mu Yun with a smile: "How come, you are just too weak, you will be fine if you practice kung fu"

Mu Yun plucked a few maple leaves that fell on the old wood and said, "Okay, Grandpa Mu"

In the maple leaves flying in the sky, Lao Mu told Mu Yun the story outside, sometimes causing Mu Yun to exclaim, and sometimes the two laughed together.