Since Lin Guodong purged dissidents, deposed Liu Qingyin as the holy daughter, and let his son Lin He repent and marry again, a large number of Liu Qingyin, that is, the old subordinates of his ancestor Liu Futong, came to Beiping to join her. Liu Qingyin did not refuse to come, and according to their specialties, they were either sent to nearby villages to preach, or arranged to work in various walks of life in the city, and some were arranged to work in textile workshops.

Most of the missionaries in the villages outside the city have a higher status, and their martial arts and strategies are also higher, while most of the subordinates in the city are eyeliner for Liu Qingyin, and most of them are doing the lowest work, such as peddlers, pawns, and men running the hall, etc., with average ability but a large number of people.

Due to the war in Beiping for more than half a year, the surrounding people fled to the capital for refuge, so Liu Qingyin's subordinates were mixed in it, which was inconspicuous, and of course, a small number of people were forcibly conscripted into the army because of their strong physique, which was also a helpless thing.

After Peng Ziyun and Liu Qingyin discussed, they asked the female workers of the textile workshop to mobilize their families, neighbors and their own eyeliner to search together, and the external statement is that this Zhang He is an ungrateful person, who was once taken in by Liu Qingyin when he was in distress, but he was ungrateful, raped and killed the maid Lanxiang's sister Lan'e, and then absconded; Unexpectedly, after escaping to the palace, he did something ungrateful; The young lady was furious, she must find this person, and the person she found will be rewarded.

Liu Qingyin treats people kindly, never treats female workers harshly, and often helps the orphans and widows around him, and has a high prestige in this area. When they heard about Zhang He's despicable behavior, everyone was indignant, and Lan Xiang burst into tears when she talked about her sister, gritting her teeth and hating Zhang He, a brute scum. Seeing a beautiful maid crying in front of him, the strong young men around him were all gearing up, intending to catch Zhang He and grab the beauty's heart.

But after mobilizing so many enthusiastic people, it only made everyone in Beiping City know that there was such a beast hiding in Beiping City, and other than that, there was no result. But Peng Ziyun and Liu Qingyin did not give up, first, they were in danger and had to do things for Jin Zhong; Another reason is that they want to know who betrayed them, and if they don't find out who this person, they can't sleep.

Of course, the direct consequence of this incident is that the real Zhang He has never appeared in public again, and he almost does not dare to go out of the room and breathe free air, which also greatly restricts his movements.

For Zhu Di, Zhang He's matter is just a small episode, and there are too many things he needs to pay attention to.

On the night of April 16, Xu Huizu conquered Juyong Pass, captured 13 generals under Li Bin, and wiped out all 20,000 defenders, and those who fled to Nankou were also captured by Li Yuan.

On April 18, Xu Huizu went out of Nankou, and under the cover of Li Yuan, conquered Changping, passed Huairou, Miyun, and Shunyi, and watched Beiping.

On April 19, Huo Zhenzhan, who was sent to harass and delay Zhang Lun, died outside Beiping City. Zhang Lun was annoyed by Huo Zhen, so he asked Wang Zhonghui of Cangzhou and Xu Kai of Hejian for help, when Huo was really addicted to harassment, he was surrounded by Wang Zhonghui and Xu Kai, Huo Zhen fought to the death, but he no longer dared to stay nearby, so he had to flee back to Beiping in a hurry. It's a pity that in the suburbs of Beiping, he encountered the soap flag Zhang who was waiting for the battle, and under the battle, he would rather die than surrender, and fought to the last moment, and was shot by random arrows.

After the Mongols took over the Xifengkou Pass, Ugqi immediately adjusted the deployment, transferred back the army near Tongzhou, and ordered his son Eseku to lead an army of 20,000 to guard the Xifengkou Pass to ensure his own back road, of course, to keep some seeds to prevent being wiped out. Then Ugqi ordered the Mongol departments to enter the customs one after another, assemble near Zunhua, and lead 30,000 troops to Shunyi to make the final alliance with Zhu Di.

There was no consensus among the Mongols about their involvement in the Ming Dynasty's civil war, with the eastern Mongols and the tribes of the Great Khan being supportive, while the western Mongols, the four tribes of Warat, were indifferent. The reason is very simple, Eastern Mongolia is very close to Beiping, and the Ming Dynasty is extremely rich, even if you come in to grab a handful, you will make money; In addition, for Elbok Khan, being able to enter the capital and return to the old land of his ancestors is also his dream; But for the four tribes of Warat in the northwest, the Ming Dynasty was too far away for them, and their eyes were more to the west, such as Kazakhstan, Hezhong and the Kipchak Khanate, although the eastern steppes were also a good choice for them, but for now, they did not dare to openly challenge the authority of the Great Khan.

In addition, Wang Xing, a warat national division trusted by Ugqi, also opposed the entry into the pass, believing that it was okay to send a small number of troops to help Zhu Di, but it was not advisable to intervene on a large scale, and he believed that the main direction of Mongolia's attack should be Suiyuan, Datong and Hetao, and even Liaodong was a better choice.

The Arutai, Mahamu, and Tuheitcha, who had the most contact with Zhu Di, were also the first to taste the sweetness of the mutual market, and they were also the vanguard who actively advocated large-scale intervention in the Ming civil war, and their attitudes also influenced the aristocracy of Erlebok and the eastern steppe. As for Ugqi, who is interested in unifying the grasslands, he can't ignore this voice, so since Zhu Di raised his army, he and the Great Khan Erlebak came to the eastern steppe near Bear Lake, and later led the army to Kaiping according to Erleboke's request.

Zhu Di keenly discovered the arrival of Ugqi, he immediately had a plan in his heart, the first time he asked for help, Zhu Gaoxu's target was Ugqi, which caused dissatisfaction among the eastern tribes, but due to Zhu Di's insistence, an agreement was finally reached. Wang Xing agreed to a small intervention, so Ugqi sent his son Eseku into the pass, but gave him the greatest autonomy to withdraw from the battle as soon as the situation was not right.

However, due to Sheng Yong's timely retreat, there was no place for the Eseku. However, when Sheng Yong's second army came to Tongzhou, due to the rapid progress, when Eseku rushed to Tongzhou, Tongzhou had been broken, and Sheng Yong's army had already arrived in Beiping, and Eseku was surprised by the combat effectiveness of Sheng Yong's troops, and refused to go north to support on the grounds that it was not within the scope of the agreement.

Due to the urgency of the situation, Zhu Gaoxu went north again to negotiate with the Mongols, and this time the eastern nobles were very enthusiastic and asked Erlebok and Ugqi to agree to the matter. In view of the mood and general considerations of the Warat tribes, Ugqi decided that the four warat tribes should send 50,000 troops, and the eastern Mongols should send 60,000 troops, and the capture of each department would be their own, and there was no need to hand over to the Great Khan.

Therefore, Ugqi sent 20,000 people from the headquarters, and 10,000 people from each of the other three departments, and Ugqi ordered his sons Eseku and Arak to guard the Xifengkou Pass, and led Taiping and Bald Polo into the pass to negotiate with Zhu Di. After the other eastern Mongol tribes entered the pass, they assembled near Zunhua and waited for the battle order.

On April 19 of the second year of Jianwen, Zhu Di and Ugqi met in Shunyi, and the participants were Zhu Di, Zhu Gaoxu, Ugqi and Wang Xing. Both sides observed each other coldly, Ugqi was older and thicker than Zhu Di, but he lacked Zhu Di's luxury and heroism; Zhu Gaoxu is a young hero, majestic, brisk, and decisive; Wang Xing, on the other hand, was dressed in Mongol clothing, his face was pale and he was slow to move.

After the two sides exchanged pleasantries, Zhu Gaoxu first saluted: "Taishi, Mr. Wang, our two sides have become a blood alliance, so this time we are mainly discussing the issue of joint operations between our two armies. ”

Ugqi spoke Chinese generally, and only after listening to Wang Xing's translation did he understand what the other party meant, but he still nodded and said, "That's very good!" ”

Zhu Gaoxu stood up and walked to the map, pointed with his hand: "Now the imperial army's army has begun to besiege Beiping, and it is currently close to 200,000, including 40,000 cavalry, but within half a month, it should increase to 300,000." ”

"And the strength of our army is about 30,000 infantry, 60,000 cavalry, and 90,000 Mongol troops."

"But our army has a strong city of Beiping to defend, at least equivalent to 100,000 troops, so the difference between the number of our army and the imperial court is not large, it can be said that it is basically the same, plus our army has more cavalry, it can be said that it has an advantage."

"And the weakness of the imperial court is also obvious, the 300,000 army consumes countless grains and grass every day, and our army has dug the canal, the imperial court cannot repair it in the short term, and its transportation can only rely on land, so it gives our army the opportunity to cut off its grain and grass."

"Therefore, I suggest that the Mongol army is responsible for cutting off the grain route, and our army is responsible for defending the city, and when the army of the imperial court runs out of food, our army and the Mongolian army will join forces to attack, and we can break the army of the imperial court in one fell swoop and lay the foundation for victory."

"Taishi, Mr. Wang, what do you think?"

Ugqi muttered a few words to Wang Xing in a low voice, and then Wang Xing clapped his palms and laughed: "The strategy of the King of Gaoyang County does look perfect, but there are still some doubts. ”

"Mr. Wang, please speak." Zhu Gaoxu said with a smile.

"First of all, if you defend the city, and we go to cut off the grain route, won't we let us withstand the attack of the southern army and be soldiers for you?"

"Secondly, you have only dug a few openings in the canal, and with the ability of the imperial court, I think it can be repaired soon, what should I do at that time?"

"In the end, if we are fighting a fierce battle in front and you can't hold Beiping City, once the imperial court occupies Beiping and blocks the Great Wall, won't it make us sit and wait for death?"

Zhu Gaoxu thought for a while, and then said: "Mr. Wang, Xiao Wang will answer the last question first, our side has an army of 100,000, and it is not difficult to hold Beiping for more than two months. ”

"As for the issue of repairing the canal, we have made an assessment, and it will take at least more than a month, and we can also send troops to harass the repair site and delay the time."

"Finally, when it comes to the issue of your being recruited for our side, in fact, this is not the case, first of all, the field combat ability of the Southern Army is extremely poor, and you can easily win it, and secondly, you can rob the grain and grass, and you can also supplement your supplies, isn't this bad?"

"Of course it's not good," Wang Xing shook his head and said, "If the Southern Army is really so easy to deal with, will the prince ask for help from my Great Mongolia?" ”

"Also, Tongzhou broke the city day and night, I don't know if you have the confidence to hold on for more than two months?"

"The matter of repairing the canal in the end remains in doubt."

Wang Xing's sharp rhetorical question made Zhu Gaoxu a little confused, and he couldn't help but look at Zhu Di. Zhu Di sighed slightly in his heart, waved his hand to signal Zhu Gaoxu to sit down, and then said: "Mr. Wang asked well, this king will explain, since the king started the army, in fact, there have only been two battles, the first is the battle of Baoding, this king attacked, Ping'an defended, this king with 50,000 troops against Ping'an 100,000 troops, and still had the upper hand, but unfortunately he was defeated by a surprise attack in the end, Ping'an is the most warlike in the southern army, and that's it; ”

"The second battle was the Battle of Tongzhou, Tongzhou was close to the canal and there was no moat, so it was captured by Sheng Yong day and night."

"And Beiping is different, the walls of Beiping are higher, and there is a wide moat, the city can accommodate 100,000 troops, and the king will personally lead the cavalry to harass outside, so as to exhaust the enemy army and delay the enemy's siege progress, so it is not a problem to hold on for two months."

"The restoration time of the canal was carefully calculated by this king, so Mr. Wang does not have to worry."

Wang Xing shook his head and said, "I can't agree with the words of the prince......

The negotiations reached an impasse at this point, Wang Xing doubted Zhu Di's judgment, and Zhu Di's explanation could not satisfy Wang Xing.

After the two sides adjourned the meeting, negotiations continued until dark, and a final agreement was finally reached.

1. Zhu Gaoxu led 20,000 cavalry and 60,000 Mongolian cavalry to act together to cut off the grain route of the southern army and delay the repair of the canal.

2. Ugqi led 30,000 cavalry with Zhu Di to harass the imperial court's siege army.

3. After the Yugoslav army ran out of food, the combined forces attacked the Yugoslav army.

Fourth, after Zhu Di captured the Beijing Division, he ascended the throne and became emperor, and immediately announced that he would give up the territory beyond the Great Wall.