What can restrain the movement of the Chu army is the water level of Danshui. It was with this in mind that the Great Sima Mansion chose to launch an offensive in early May and enter Guanzhong in June. The Danshui water level would not drop until mid-July, when the Chu army had finished its campaign in Guanzhong and retreated to Nanyang and Nanjun, east of Wuguan.

War is like a chess game, and many things are transparent. Both sides can roughly calculate how much resources the other side has, know how the other side will act, but it is limited by time, resources, and geography, and there is no way to stop the other party's actions. Only when the objective conditions that support the opponent's actions change, will the situation of the battle change.

Wei Yu is now waiting for the water level of Danshui to drop and for Xianyang City to run out of grain. At that time, the Chu army will definitely withdraw to Weinan, and the Qin and Chu armies will fight a decisive battle in Weinan. Before that, Li Xin's 400,000 people wanted to hold back the Chu army in Nanyang, Zhao political leaders could not be emotional, and the Qin soldiers could not know that Xianyang had been pulled out by the Chu army. If these things are done, more and more Qin troops will win the decisive battle.

Starting in the morning, the Qin soldiers who escaped from Xianyang last night and came to the Bashang military camp to report the news were all regarded as spies of the Chu army and were all poked to death. At noon, the news in Xianyang City became clearer and clearer:

Last night, the Chu army suppressed the defenders at the head of the city with witchcraft, broke through the south gate and entered the city. After most of the guards in the royal city were killed, they attacked Gaomen. Queen Qi Qian led her ministers to ask King Jing for their guilt, and Xianyang City was restored to peace. The Chu army took over the city defenses, and did not kill the Qin people, nor did they kill the Shaofu craftsmen - this is what Wei Yi was most worried about but did not dare to say to Zhao Zheng. The palace, the Prime Minister's Mansion, and the State Captain's Mansion were all raided by the Chu army, but fortunately, when the city was broken, the State Captain's Mansion urgently burned a number of important books......

The situation in the city was like this, and what surprised Wei Yi the most was the ink people of Shaofu Yan Wuyi, who organized a rebellion when the city was broken, and withdrew from Xianyang City when Queen Qi Qian ordered the Qin army to surrender.

"Do you know where Yan Wuyi is going?" Wei Yu looked at a Hou spy in the Captain's Mansion and asked. This person is smart, he didn't say that Xianyang was pulled out in Yuanmen, but only said that he asked to see the national captain, which saved his life

"Captain Yu: The villain only heard that the ink man went out of the city and transported many transfers. It was late at night, and I didn't know where it was going. Hou said.

"Transfer?" Turning the pass is an invention of the Mo family, in order to quickly cross the moat during the siege. This is a siege, Yan Wuyi went out of the city with a transfer, of course, not to siege the city, it should be to cross the Weishui. It's just that since Yan Wuyi crossed Weishui, why didn't he come to Bashang? Could it be that they ......, thinking about it, Wei Yi thought of a place, and the only possible place: Weinan.

The royal city of Xianyang was too narrow, and the first emperor Zhaoxiang began to build palaces in Weinan. Zhangtai Palace, Qutai Palace, Jimiao ......, decades of construction, Weinan Palace is not less than Weibei. Now the king is also building a palace in Weinan, where there are more than 100,000 people of Chengdan and craftsmen, if Yan Wuyi and those ink people go to Weinan, they will soon be able to raise a large army.

"Someone! "Weinan is just south ......of Xianyang, and Bailuyuan (Bashang) is southeast of Xianyang, and the two places are seventy or eighty miles apart. When Wei Yi sent someone to contact Yan Wuyi, Zhao Zheng woke up.

Zhao Zheng, who fell asleep in the dark, slept very deeply, and after sleeping for five hours, he woke up to find that the Qin army's march had ended and had been encamped. Today, I only walked 20 miles, and there are still 100 miles away from Xianyang City. Everything has not changed in the Wang Shogunate, and everything has not changed in the Shogunate, but everyone is different from yesterday, and then asked Xianyang, Zhao Yong and others to be divided, only to say that the news is not accurate, and the Chu army is attacking the city.

Freedom and trembling are two states, and Zhao Zheng had to summon Wei Yi, who had the information of Hou Spy, to know the situation in Xianyang. Wei Yi was well aware of Zhao Zheng's psychology, and after entering the account, he didn't wait for Zhao Zheng to ask, so he took the initiative to say: "The minister knows Xianyang. Jing people want to destroy Xianyang, but Xianyang is by no means comparable to the small city of Lantian, although the witch weapon destroys the city wall, but it is not broken. ”

"Really?!" Zhao Zheng saw with his own eyes that the wall of Lantian City was blown up by the Chu army's witchcraft, and the entire section of the city wall flew into the sky. He has always avoided thinking about that picture by himself, because of such a broken city, Xianyang can't hold it for half a day.

"General Zhao, how thick is the wall of Lantian City?" Such a grandiose bully, Zhao Yong and the others listened to the drum in their hearts, and now they were called by Wei Yi, and Zhao Yong did not react. "General Zhao ......" Wei Yi dragged out his tone and shouted Zhao Yong again.

"Minister," Zhao Yong stammered, looking at Wei Yi's smiling gaze, he said stiffly: "As far as the minister knows, the walls of Lantian City are seven feet and two feet. ”

"Ask General Zhao again, how thick are the walls of Xianyang?" The smile on Wei Mi's face was even worse.

"The thickness of the Xianyang city wall is 21 zhang and 6 feet, plus the internal and external slope protection, almost 26 zhang." Zhao Yong told the truth.

"Twenty-six zhang?" Wei Yu didn't need to explain, just more than three times the thickness was enough to give Zhao Zheng hope.

"The king, the ministers heard that the Jingren witch weapon needs to consume witch medicine when it is used, and the witch medicine is obtained from Xizhou, and the income is small. Bai Di didn't transport hundreds of catties at a time. For the first time, Wei Yu detailed the secrets of the Chu people's witch weapons in front of the generals.

Witchcraft require the use of witch potions, which contain sulfur, which was developed by Aristotle IV; It is also said that under the strong request of the Chu people, Bai Di merchants trafficked sulfur to the Chu State in exchange for huge iron, which shows that sulfur is one of the witch medicines, and there are also charcoal or charcoal, and the last (maybe a few) witch medicine is still unrecognizable.

Although this information is small, it is enough for Wei Yu to make a roughly correct judgment: the reason why the Chu army's witchcraft appeared so late should be limited by sulfur, otherwise it would not have allowed the Bai Di people to travel thousands of miles from Great Xia to Yingdu. Since the sulfur is finite, witch potions cannot be endless, just like arrows, which will always run out.

The thickness of the Xianyang city wall is as thick as 26 zhang, and there may indeed be a situation where the Chu army is short of witchcraft and cannot break the city. However, as long as you use your brain a little, you can know that the king of Chu led the Chu army to attack Guanzhong, and then went straight to Xianyang, how could there be a shortage of witch medicine? Such a large-scale military operation could not be a temporary intention, and it can be seen from the fact that the Chu State stopped building sea boats, and the Chu people had been preparing for at least a year and a half to attack Guanzhong.

Wei Yu just said a possibility, and that was enough. Zhao Zheng looked at him excitedly and nodded again and again, "Yes." Yes, too. Jing people's witch medicine sought Xizhou, and it was no longer enough to attack the city of Xianyang. ”

"Xianyang is still holding on, but Jing people are good at spies, and they will make people mess with our army." Wei Yu lied without blinking, he was sure that Zhao Zheng had self-hypnotized, convinced that the Chu army was not strong enough witch medicine.

"Hou Spy should be killed!" Zhao Zheng's face changed, his eyes burst out, and he said viciously.

"The minister has already died." Wei Yu remained silent, and his back, which had been tense, relaxed at the moment.

"However, our army, our army ......" Even if Xianyang was not pulled out by the Chu army, Zhao Zheng was still worried about Xianyang. The Qin army was 100 miles away from Xianyang, and it took five days to walk 20 miles a day, during which they had to cross Weishui.

"The king, the minister thinks that the Jing people have been pulling out Xianyang for a long time, and the grain is insufficient, and they will definitely go to Weinan again. Our army is waiting for work in Weinan, and the soldiers of all counties are coming, and they will be able to win the battle. Wei Yu talked about the planned decisive battle in Weinan. He has also chosen the battlefield, just north of Du County, west of the Tongdao Road, and east of Zhangtai Palace in Yin Township (now north of Xi'an City), where he was buried in the disease.

This is not his wishful thinking, all the grain in Xianyang Warehouse was burned, and the Chu army would run out of food in a month at most. There were two options for cutting off food: either go deep into Qin or withdraw to Shangyu, and he believed that the Chu army would choose the latter. Even if he didn't choose the latter, he would order the neighboring counties to burn all the corn in the warehouse, so that the Chu army would not be able to eat.

Wei Yi calculated that in Xianyang City, in Huayang Palace, where Xiong Jing was resting, under the observation of a cadre, Su Ke was reporting to Xiong Jing: "...... There are still 265,000 stones of millet, 2,500 stones of sauce, 500 tons of tinplate, 280,000 stones of bean root, 43,000 stones of weed, 5,300 stones of salt, 2,300,000 stones of wine, and ......."

Su Ke reported all the grain and weeds that the Chu army could dispose of at the moment, some of which were brought by the Chu army, and some of which were captured by the Qin people after entering the city. Because all the warehouses inside and outside the city were burned, there was not much grain left except wine, especially the least.

Bean and weed are things to feed horses, bean weed is not good to burn but a little bit of weed, now these more than 40,000 stone weed are collected from the stables and stables in Xianyang City. There are more than 30,000 horses and war horses, and these weeds will be eaten in four days. The solution can only be to increase the number of bean grass and reduce the amount of weed, after all, the soybean can last for 17 days according to the established standard. It's just that no matter how much you adjust, the horse feed is only enough for eleven or twelve days, and it won't exceed fourteen days at most.

However, this is not the most important thing, after Su Ke reported all the numbers, he said: "Xianyang is a big city in the world, there are more than 600,000 Dingkou, and its corn comes from Xianyang Cang, and now the corn in Xianyang Cang is burned, and the whole city will be out of grain ...... three days later."

"What does it matter to me whether the Qin people live or die?" Fei Fang snorted, feeling that Su Ke was too talkative.

"In this dog hour, if many common people die, there will be epidemics in the army." The life or death of the Qin people really has nothing to do with the Chu army, but now that the two sides are in the same city, if they really starve to death on a large scale, the corpses will be flatulent and stinky in a few days. "The minister asked the king to let the Qin people go out of the city to eat."

Doctor Yin Yuli This is the third time he has come to Xianyang. He felt that although Chu Qin was an enemy, he should not harm the common women and children.

"If you let the Qin people go out of the city to eat, I am afraid that our army will ......" Dou Chang was a little worried.

"Definitely. The Qin people will hide the fact that Xianyang was uprooted, and I should go to the Qin military camp in Weinan to confuse their hearts. Zhuang Wudi smiled, he could guess what Wei Yi would do. A few days later, when Dongye Ao led the army to arrive, our army was flanked before and after, and the Qin people would be defeated. ”

Zhuang Wu is talking about the Ding case. After deciding to pull out Xianyang, the army flew to Yingdu that night after the carrier pigeon, and asked the Chu army left in Nanyang to reinforce Guanzhong as much as possible, so as to flank the Qin army with his own army. Danshui is full, according to the itinerary, the Nanyang Chu army rushed to the mouth of the Gongchuan, the latest is ten days, the short is eight days, the Chu army's grain can fully hold up to that time.