In the early autumn of the fifteenth year of the reign of Emperor Lu (BC645), the state of Qin sent a letter to the state of Jin, in which the text first recalled the friendly past between the Duke of Jin Xiangong and the state of Qin, and the various favors exerted by the people of Qin to the state of Jin; Then with a turn of the pen, he listed the bad deeds of Jin Huigong: "First, betray the promise and do not accept the sons of the group; 2. **Shameless, defiling Prince Gong's widow; 3. Greedy and stingy, not sympathetic to heroes; Fourth, coveting land, trustless powers; Fifth, grace will take revenge, and there will be no help in danger. Now even Heaven can't suppress his anger against Jin Jun, so God announced to the world through Shen Sheng's ghost and decided to punish Jin Jun through the hands of the Qin people, so as to maintain the way of heaven, Zhou etiquette, faithfulness, and human ethics. At the end of the inscription is a declaration of war issued by the Qin state, and at the same time expresses an unshakable determination to defeat.

With the efforts of Qin spies and good deeds, this inscription quickly spread to every corner of the Jin Kingdom. Except for the most shameless people, every countryman feels ashamed and can't hold his head up; But the office immediately issued a conscription order, and the Jin people had to be conscripted into the army.

On the other side, the Qin army was assembled and set off from Yongdu; The army crossed Weishui to the south, and then marched east along the Weishui road; Grain, grass and baggage were transported by water; The flotilla went hand in hand with the army on the shore. The vanguard of the Qin army cleared the scattered Rong Di on the way forward, and the army passed through Huashan Mountain, and then passed through Taolinsai, the territory of the Jin state to the east of Taolinsai.

The Qin army reached the crossing of the Bianyi and crossed the Yellow River north here, the first line of defense laid by the Jin army on the other side of the river. Qin Dafu Bu's apprentice made a fortune for the fierce luck of crossing the river, and the result was good luck. He reported to Qin Mugong: "Daji, after crossing the river, the chariot of the Marquis of Jin will be obtained by me." ”

Qin Mugong asked him to explain the hexagram in detail, and the apprentice said: "The minister has gone to the 'Gu' hexagram. The hexagram says: 'A thousand times three goes, and after three goes, the male fox is obtained.' This male fox refers to the Marquis of Jin. The inner hexagram of Gu is Qin and wind, and the outer hexagram is Jin and mountain; It's autumn now, and the wind is blowing over the mountains, and the leaves will fall. The wood is folded and falling, what is the undefeated? ”

Due to the length of the river boundary, the Jin army could not defend it on all fronts, so the Qin army did not encounter too strong resistance when crossing the river. After the Qin army landed, it broke through the enemy's two lines of defense one after another, and Han Yuan soon appeared in front of the Qin army.

The plan of the Qin people was not to conquer the city, but to directly fight the main force of the Jin army; The purpose was not to plunder and rob, but to force the Jin people to submit; This requires the Qin army to fight quickly and quickly, and cannot drag mud and water. Therefore, the Qin people excluded the old and weak who were not suitable for high-intensity marching and combating in the conscription; In this way, the two armies of the Qin State were actually not fully staffed.

The Qin army drove straight in, and unfavorable news kept reaching the ears of the generals and Jin army leaders. Jin Huigong said to Qing Zheng without worry: "The enemy is going deeper day by day, what can be done to stop them?" Qing Zheng said: "It was the prince who summoned the enemy, what can the courtiers do?" Hui Gong said angrily: "The master's words are really not inferior! ”

Jin Huigong and Lu nephew led the army, and Yin said and Yin Rui led the army; Han Jian, Yin Xuan, and Yin Qin were military doctors, Shigu was a military captain, and Luan Dun defended the country. After the appointment of the generals, Jin Huigong conducted divination for the candidate to serve as the right of the car, and the most suitable candidate turned out to be Qing Zheng. But Hui Gong felt chest tightness and shortness of breath when he saw Qing Zheng, and as a result, he was eliminated.

Jin Huigong appointed Yin Buyang as the royal Rong, and the domestic servants as the right of the chariot, and planned to use the small horse given by Zheng Guoren to drive the chariot. This kind of small horse is a kind of delicate-looking and delicate pet pony carefully bred by Zheng Guoren, they were originally used by the concubines to drive when they travel, but Jin Huigong whimsically used them as war horses.

Qing Zheng said: "In ancient times, when the country encountered war, the soldiers had to use the war horses produced in their own country to drive. The country's war horses obey their water and soil and know people's hearts, and they are content with lessons and review their ways, so there is nothing that does not suit the hearts of the soldiers when they use them to fight. Now the princes use foreign ponies, and the ministers are afraid that they are in danger and frightened, and they do not know orders, do not listen to control, cannot advance or retreat, and do not know how to move. When the time comes, the prince will definitely regret it. ”

Jin Huigong didn't bother to talk to Qing Zheng anymore, he waved his hand, boarded the chariot without saying a word, and ordered Yin Buyang to walk quickly to get away from the nagging chatter. Yin Buyang and his servants stood in the car, looking at Qing Zheng helplessly. Qing Zheng shook his head and muttered: "It's a pity that the two national soldiers are actually mixed up with Ma Zhong's sissy cannon." But this little horse is a perfect match for our prince. ”

The Jin army marched south from Jiangdu and crossed the Zhongtiao Mountains to Hanwon. Han Yuan is located in Ruicheng County, Shanxi, originally belonged to the ancient Rui State, and was later occupied by the Wei State, and it was divided into a county after the Jin State destroyed the Wei State. Hanyuan is surrounded by Zhongtiao Mountain in the north and the Yellow River in the south. Both sides of the war chose this place where the terrain was complex and changeable, and it was not suitable for large-scale group battles, in order to maximize the combat effectiveness of individual soldiers and see whose soldiers were braver and stronger.

The day before the Battle of Han, Han Jian was ordered to reconnoiter the enemy. Han Jian ambushed outside the Qin camp and observed for a while, and saw that the enemy army was waving flags, soldiers were strong and strong, soldiers were high, and even war horses were very excited. He returned to the camp and said: "The enemy is less than me, but the fighting spirit is twice as high as mine.

"When the prince was in Liang, he was sponsored by the Qin people, and when he returned to the country, he relied on his great help, and the country suffered a natural disaster, and no one starved to death by relying on the food supported by the Qin state. The Jin people received kindness three times but did not reciprocate, and sat back and watched the Qin state suffer, so the Qin army came to crusade. Now not only do we not want to negotiate peace, but we also go out to resist, our side is slacking off and the enemy is excited; The fighting spirit is twice as low as mine, and I'm afraid it will be several times higher than me. ”

Jin Huigong said: "The husband should not be despised yet, let alone the country!" Get ready now! Then he sent Han Jian to the Qin military camp to write a war letter. It was Gongsun Zhi who received Han Jian, and Han Jian conveyed the words of Jin Huigong: "The widow has no talent, and he can gather all the people but cannot dismiss them; If the Qin army cannot return to China, the widows will have nothing to flee for. ”

Gongsun Zhi made a report to Qin Mugong, and then came out and replied: "When Jin Jun did not return to China, the widow was afraid of him; When he returned home but did not settle down, the widow still felt anxious; Jin Jun is now stable, and the widow is relieved, dare not obey Jin Jun's orders! ”

The two sides agreed on the time of the war, Han Jian withdrew from the military tent, turned his head and said to his entourage: "Tomorrow will be the battle, and it will be a great luck that we can be captured by Qin Sheng." ”