Huo Qubing was a general in the Western Han Dynasty. He was a native of Pingyang County, Hedong County (now Linfen, Shanxi). He was the nephew of Wei Qing, another "undefeated general" in history. At that time, the Xiongnu in the north often plundered the borders of the Han Dynasty. When Huo Qubing was 18 years old, he was sent to lead an army to conquer the Huns in the north. He led 800 cavalry into the enemy formation, killed more than 2,000 Huns soldiers at one go, and captured the uncle of the Xiongnu Chanyu alive. He was famous for his bravery and was the leader of the entire army. Two thousand five hundred households champion.

After several victories, the Xiongnu's military strength was greatly weakened and they had to retreat to the distant north of the desert. In the autumn of 120 BC, more than 10,000 Xiongnu cavalry invaded south again and penetrated deep into the Youbeiping area (today's northern Hebei area), burning, killing and looting. Thousands of Han Dynasty border residents died under the Huns' cavalry. So Emperor Wu of the Han Dynasty decided to go on an expedition to Mobei and completely eliminate the Xiongnu army.

In this year, Emperor Wu of the Han Dynasty mobilized 100,000 cavalry and hundreds of thousands of infantry troops, led by Wei Qing and Huo Qubing, and marched towards Mobei in two directions: east and west. Huo Qubing led his army from Dai County (today's Dai County, Shanxi Province) and galloped across the desert for more than two thousand miles before finally capturing the main force of the enemy army. So Huo Qubing commanded the Han army to launch a fierce attack, and a fierce battle began. The spears were broken like straw, the vast grasslands were filled with abandoned corpses, the mountains and rivers changed color, and the sun and the moon were dim. After several days of bloody fighting, the Han army finally won. In this battle, 70,000 enemies were wiped out, and almost the entire army of King Zuoxian of the Xiongnu was destroyed. Huo Qubing led his army to pursue the enemy all the way to Langjuxu Mountain (today's Deer Mountain or Hangai Mountain in Mongolia). In order to celebrate the victory of this battle, Huo Qubing led his people to build up a mountain with soil on the top of Langjuxu Mountain and held a ceremony to offer sacrifices to heaven.

He was walking outside the camp at night. When he looked up at the Big Dipper, he was surprised to find that the seven stars of the Big Dipper had passed the zenith and were heading south. It was the first time he saw the inverted pattern of the Big Dipper. He almost didn't recognize it at first sight. He quickly called on the soldiers to watch it together. Everyone was amazed at this strange sight. They felt that the sky was as round as a cover, the place was like a chess piece, and the universe was like a chess piece. The mystery is beyond words. Later, Huo Qubing held a Zen ceremony to commemorate the land in the nearby Guyan Mountain, climbed to Beihai (today's Lake Baikal), carved a monument to commemorate his achievements, buried it there, and then returned to the court in triumph. This is the story of "Huo Qu fell ill and watched Beidou". Unfortunately, Huo Qubing died of illness shortly after returning to the court at the age of 24. This military genius did not care about enjoyment, but devoted his whole life to the cause of border defense. Two of his famous sayings have been passed down to this day: "The Huns are not destroyed, so why do we need to live at home?"

The latitude of Lake Baikal is approximately 55_N, on the Big Dipper At mid-heaven it has turned to the south. This is indeed a strange thing for people who grew up in the Central Plains. Liu Shang of the Tang Dynasty wrote in the poem "Eighteen Pai of Hujia": "It's strange that the spring breeze doesn't come for a long time. The Hujia is windy and has no flowers and willows. Who would have known that the world has been turned upside down, and now we are looking south at the Beidou." He was also sighing at this scene.