Zheng Guo was the Korean hydraulic engineer who was responsible for supervising the construction of the Zheng Guo Canal, and after the completion of the Zheng Guo Canal, he still served as the water commander in Qin and was in charge of the water conservancy projects of the Qin State. Zheng Guo was originally a Korean, because he was good at building water conservancy projects, and had been to Wei to specifically investigate the gap, so he also knew very well about the water conservancy situation in the vicinity of Daliang City.

It turned out that after the destruction of Zhao, Wang Jian had already realized that the next target of Qin was Wei, and Daliang City was a difficulty that the Qin army had to overcome, so Wang Jian also collected information from Wei in many ways and considered a plan to conquer Daliang. And Wang Jian also keenly discovered that there are many rivers around Daliang City, so he came up with the idea of attacking Daliang with water, which coincides with Li Mu's idea, and it can be regarded as a hero's vision.

The Spring and Autumn Period and the Warring States Period were an important stage in the development of ancient Chinese warfare, both water and fire were applied to the battlefield, and there were two water attack tactics recorded in inscriptions, the first time was in the late Spring and Autumn Period of the Jin Kingdom. At that time, the Jin State was established by the four great clans of Zhi, Wei, Zhao and Han, and the Zhi clan was the strongest, coercing the combined forces of the Wei and Han clans to besiege Jinyang (that is, Taiyuan City), the fiefdom of the Zhao clan. But the city of Jinyang was impregnable, so the Zhi clan dug up the Jin water and flooded Jinyang. When the water poured into Jinyang, the leaders of the three clans stood on the top of the mountain and watched, and the Zhi clan said proudly: "I didn't know that water could be a country of death!" It's now known! ”

But this sentence aroused the vigilance of the Wei and Han clans, because there was Fenshui on the edge of Anyi, the fief of the Wei clan, and Jiangshui on the edge of Pingyang City, the fief of the Han clan. Since the Zhi clan can attack Jinyang with water, they can also use the same tactics to deal with the Wei and Han clans in the future. At this time, the Zhao family was almost unable to resist, so they sent people out of the city to secretly unite with the Wei and Han clans, and the three families destroyed the Zhi clan together, and soon after, the three families of Wei, Han and Zhao divided the Jin Kingdom, thus ending the Spring and Autumn Period and entering the Warring States Period.

And this flooding of Jinyang is also the earliest water attack tactic recorded in the official history of China.

Another water attack took place in the 28th year of King Zhaoxiang of Qin (279 BC), when King Zhaoxiang of Qin named Bai Qi to raise troops to attack Chu and attack Yancheng (present-day Yicheng, Hubei). The state of Chu also transferred the main army to resist Yancheng, and Bai Qi commanded the Qin army to attack the city, so he built it in the west of Yancheng and dug Han water to irrigate the city. Yancheng suddenly turned into a flood, and hundreds of thousands of Chu soldiers and civilians drowned. The cities of Yan and Deng were lost. The following year, Bai Qi took advantage of the victory to command the Qin army to conquer the capital. The state of Chu was forced to move eastward, and since then the state has been in decline, and it is no longer able to compete with the state of Qin.

Although the Zhi clan was finally destroyed by the three families of Wei, Han and Zhao, it was tactically successful to dig the Jin water to attack Jinyang, and the battle of Yan was a victory that was almost a complete victory, and this was fought by the Qin State itself forty years ago, which also shows that the method of water attack is indeed an effective tactic. In addition, now Qin State has an excellent hydraulic engineer like Zheng Guo, so the plan of attacking the beam with water is also completely feasible.

However, after all, Wang Jian was very cautious in using troops, and made a special trip to consult Shui Ling Zheng Xuan, and only after getting Zheng Guo's reply did he make a final decision, and only today did he express his thoughts to Qin Wangzheng.

Therefore, Qin Wangzheng also slapped the table and said: "Okay, the widow is determined by himself, and the move of cutting down Wei cannot be changed." ”

When the other ministers saw it, they bowed in unison like King Qin: "The king has decided." ”

Qin Wangzheng nodded, said: "In the past, when my Qin State had not yet risen, I was repeatedly bullied by the Wei State, at that time, the whole country regarded the Wei State as a confidant enemy, and then fortunately, the filial piety of the Shang Jun changed the law, and the Qin State seized the land of the West River, and became strong, and now the general trend of the Qin State to unify the world will be completed, Han Zhao will die, only the Wei State is still there, and the Wei State will be destroyed, and the unification of the world will be just around the corner, and success or failure will be in this move." ”

Among the six eastern countries, the feelings of the Qin people towards Wei are the most complicated, because between Qin and Wei, there are indeed grievances and grievances, which are also a microcosm of the trend of the entire Warring States Period.

At the beginning of the Warring States Period, the national strength of Wei was strong, Qin was repeatedly attacked by Wei, lost the entire Xihe land, Wei set up Xihe County, and sent the famous general Wu Qi to sit in the town, firmly restraining Qin's eastward road, if it were not for the fact that the main direction of attack of Wei at that time was Chu in the south, but to go west, Qin was indeed in danger of dying.

Later, the Qin State carried out the Shang Dynasty reform, and the national strength began to be strong, and the Wei State was defeated by the Qi State twice because of a series of strategic and tactical mistakes, and the national strength fell sharply, and the Qin State took the opportunity to attack and regain the land of the West River. The weaker the Wei state became, it was reduced to a second-rate state, only slightly stronger than Yan and Han, and lost nearly half of its territory.

But at this moment, Wei produced a Xinling Jun, formed a five-strong coalition army twice, defeated the Qin army, and beat the Qin army until it retreated to Hangu Pass, not daring to go out of the pass to face the battle. Wei also gained prestige, regained large swaths of lost territory, and re-advanced its territory to the east bank of the Yellow River. Seeing that the revival of Wei was promising, but King Wei Anjiao was suspicious of Xinlingjun, relieved Xinlingjun of his military power, and left him idle, as a result, Xinlingjun died of depression, and Wei completely lost hope of revival, and the country's situation fell again.

After relieving this breath, the Qin State once again sent troops to the east, seized the land east of the Wei River, set up the East County, and gradually encroached on the territory of the Wei State, and now the Wei State has been surrounded by the Qin State on three sides, and its destruction is in danger. However, as Li Si said, Wei is in the hinterland of Qin, dividing Zhao and Han into two parts, so if Wei is not destroyed, Zhao and Han will be unstable for a day, and Qin will not be able to expand outward. This battle against Wei was not only an important step for Qin to unify the world, but also a complete end to the grievances between Qin and Wei.

After the ministers finished speaking, Qin Wang Zheng turned to Han Teng and said, "What does Han Qing think?" ”

Han Teng said: "The minister respects the king's order. ”

Qin Wangzheng nodded, although Han Teng questioned the move of Wei Wei, but Qin Wangzheng didn't think it was strange, because the court discussion is to discuss, listen to all kinds of different opinions, different voices, even if there are opposing voices, it is also reasonable, only by synthesizing all opinions, can we make the right decision, this point is still in mind Qin Wangzheng.

However, once a resolution has been made, it must be implemented with all its might, even if there is opposition to the resolution. Therefore, Han Teng's answer also made Qin Wangzheng very satisfied, at least on the surface, Han Teng had accepted the resolution made by this court meeting.

Then Qin Wangzheng immediately ordered to appoint Wang Jian as the chief general of the Wei War, and the generals who accompanied Wang Jian to fight were Yang Duanhe, Han Teng, Wang Ben, Qiang Qi, Zhang Han and others, and Shui ordered Zheng Guo to also go out with the army and dispatched 200,000 Qin troops; He also ordered Meng Wu and Meng Tian's father to lead the 100,000 Qin troops stationed in Zhao to enter the line of Quyang and Fanwu, enter Dai County, and contain Dai County's troops; He also ordered the generals Li Xin and Ma Xing to lead 50,000 Qin troops and stationed in Yingchuan County, on the one hand, to help Changping Jun stationed in Han to suppress Han Di, and at the same time to prevent Chu from sending troops to rescue Wei.

He also ordered Feng Ji and Wei Yi to lead an army of 100,000 and levy 400,000 people for civilian service, and stationed in Nanyang County as a reserve force and to ensure the supply of grain and grass on the front line. In the Xianyang area, 500,000 civilian servants were recruited to be responsible for the supply of grain and grass materials. In Xianyang, Li Si and Wang Juan were fully responsible for the entire war.

Then, Qin Wangzheng handed over the order symbolizing military power to Wang Jian on the spot.

Wang Jian took over the order and immediately announced that early tomorrow morning, all the generals would report to the General's Mansion and obey their orders.

In this battle against Wei, although there were only 200,000 troops put into the front line to fight, the Qin State actually dispatched 500,000 troops, because the Qin State still had 50,000 troops stationed in Yingchuan County, so the troops stationed in the local area reached 20, and the civil service conscription was close to 1 million, the reason is that Han and Zhao were separated by the Wei State, and it was difficult to form a unified protection. From this point of view, the destruction of Wei first was indeed the top priority of Qin.

After retiring from the dynasty, all the ministers also went out of the palace, two, two, three, three, and walked with the ministers they knew, Han Teng was an outsider, and it was not a few days after he returned to the Qin State, and he was usually deliberately low-key, so he was not familiar with anyone, and every time he entered and exited the palace, he walked alone, but today Han Teng's unexpected expression in the court showed his maverick, and some ministers even pointed behind his back and whispered. However, Han Teng didn't care, and there was a sneer of disdain on his face.

Walking out of the palace gate, it was Cao Wushu and Xiong Wuwu who greeted Han Teng at the door, and when they saw Han Teng coming out, the two immediately greeted him and said, "My lord, you came out." ”

Han Teng nodded and said, "How is it?" ”

Cao Wuzhi said: "Ji Wuzhi has returned from Qi State, and he is waiting for the Lord in front of him." ”

Han Teng said: "Okay, let's go back to the house immediately, I will also make arrangements, this trip to Wei is very important to us." After saying that, everyone got into their carriages and rode away.

Now Han Teng's official rank is one of the important ministers of the Qin State, not only has his own fief Tianyi, but also has his own mansion in Xianyang, of course, the scale is not small, Han Teng and his subordinates all live in it, and Han Teng's Nanyang Army, part of it lives in the mansion, and part of it is stationed in Han Teng's fief.

And after returning to the house, Han Teng immediately recruited all his people, and now one of Han Teng's five god generals and ten no generals is in Qi country, and the others are all gathered in Han Teng's mansion at this time, and some of them are specially recruited from the fiefdom.

Therefore, after Han Teng gave the order, the thirteen people immediately rushed to the main hall of the mansion to gather, and Han Teng first said to Ji Wuzhi: "Wuzhi, you can talk about the current situation of Qi State first." ”