Fang Yuan stationed in the old dragon head sea city and immediately implemented the next plan.

The first was to send Shi Lang to lead a fleet of sailors to land from the unfrozen port in eastern Liao, enter the hinterland of Liaotu, invade the rear of the Manchu Qing Dynasty, and implement the policy of reducing the number of soldiers.

The second is to send people to surrender Wu Sangui's Guanning army on the Acropolis of Shanhaiguan.

Wu Sangui has 40,000 Guan Ning troops, and he said that he can decide the ownership of the world, and he thinks too highly of him. But Wu Sangui can still call the shots of Shanhaiguan's ownership. At least half of the victory or defeat in this battle in Gyeonggi was tied to Wu Sangui.

If Wu Sangui surrendered to the Manchu Qing Dynasty, 80,000 Manchu iron cavalry and 40,000 Guanning troops, according to Fang Yuan's estimate, this time he only brought 70,000 or 80,000 soldiers and horses to the north, and the chance of victory was not great, so he could only withdraw to Shandong and plan later.

If Wu Sangui surrendered to Fang Yuan, the Manchu Dolgon had no choice but to retreat.

The envoys sent by Fang Yuan gave Wu Sangui the following conditions for surrender: 1. Wu Sangui continued to serve as the former governor, the general army of Guanning, and the generals under his command also served together, which was the same as before; 2. The Wu family's land and wealth in Beijing were retained; 3. The Guanning Army must accept the reorganization and enter the Xuanjia Army, and the monthly salary will be increased from 2 taels per month to 5 taels per month according to the standard of the Xuanjia Army.

Fang Yuan asked himself that these three conditions were already very generous, and the only thing that made Wu Sangui embarrassed was probably Guan Ningjun's acceptance of changing this condition. However, this condition is a red line, if the adaptation can't be done, then what is the difference between the Guan Ning Army and the previous warlords? How could Fang Yuan spend money to raise a group of warlords who were out of the control of the regime?

He sent Zhou Jian as an envoy to Shanhaiguan to persuade him to surrender, and also sent 100,000 taels of silver as a measure to appease Wu Sangui. Zhou Jian was in charge of the Gyeonggi Garrison Ming Army, that is, Wu Sangui's father Wu Xiang, as well as the life and death of dozens of family members in Beijing. Zhou Jian went to persuade him to surrender, and the psychological pressure on Wu Sangui was obviously greater.

Zhou Jian and his entourage sent the silver to Shanhaiguan, but Wu Sangui just received him politely, and then placed Zhou Jian in the Guancheng without movement for several days.

Wu Sangui is also in a dilemma these days, in the pass, Fang Yuan's 70,000 Xuanjia army arrived in Laolongtou Haicheng and sent Zhou Jian to be a messenger to persuade him to surrender; Outside the pass, the Manchu Emperor Dolgon also arrived at the Shanhai Pass, and also sent Fan Yongdou, a Jin merchant who had cooperated before, to persuade him to surrender.

The two forces, one in the south and one in the north, all sent envoys to persuade Wu Sangui to force Wu Sangui to the crossroads of history.

The Manchu Qing made it a condition that Dolgon ordered Azig and Wu Sangui to become brothers with different surnames; As long as Wu Sangui leads the Manchu Qing Dynasty into the customs, how much territory can Wu Sangui's department build, and the plundered children and money are all owned by Wu Sangui.

The Manchu Qing Dynasty was generous to others, anyway, the land children of the Ming Dynasty were not Manchus, and they were happy to borrow flowers and offer Buddha to Wu Sangui as a favor.

The conditions offered by Fang Yuan are obviously not as attractive as those of the Manchu Qing Dynasty, and the other conditions are easy to say, but Guan Ningjun must accept the adaptation, which makes Wu Sangui jealous. The Wu family can enjoy a respected status, so that the forces of Fang Yuan and the Manchu Qing are all co-opted, just because they control this Guanning army. If Guan Ning's army is gone, Fang Yuan wants to kill and take it, how can Wu Sangui resist?

In terms of leniency of conditions, it is natural that the conditions of the Manchu Qing are more attractive. But in terms of loyalty, Wu Sangui knows what the nature of the Manchu Qing Dynasty is to enter the customs. The surrender of Fang Yuan was just a civil war in the Ming Dynasty, Wu Sangui was considered to judge the situation, and the one who knew the times was Junjie; After surrendering to the Manchu Qing Dynasty, he firmly established the name of a traitor, and he could not wash away his shame after a thousand years.

Wu Sangui was preoccupied, put on a tiger skin jacket, and was escorted by a few personal soldiers to the Beiguan Tower of Shanhaiguan, looking at the Manchu Tartars in the distance outside the pass, the military camp with torches flashing, and was silent.

Previously, he had clearly considered the pros and cons of surrendering Fang Yuan and the Manchu Qing from the two factors of favorable conditions and loyalty. The Manchus and Fang Yuan each scored one point.

There is also one of the most important considerations, that is, military considerations, and Wu Sangui cannot afford not to scruple about them. He is the commander-in-chief of the Guanning Army, and he cannot ignore the interests of the entire Guanning group.

Fang Yuan and the Manchu Qing Dynasty, which is stronger or weaker is also his highest priority. Surrender to the stronger side, and the Guanning army can be preserved to the greatest extent; Surrendering to the weaker side, Guan Ningjun has obviously become the legendary cannon fodder.

Wu Sangui has been fighting against the Manchu Eight Banners all his life, and the Manchu Eight Banners are powerful, and he knows it well. Even with the combat strength of the Guanning Army, it is not easy to play a 2:1 battle loss ratio with the Manchu Qing under the same strength.

What about the combat power of Fang Yuan's Xuanjia Army?

Wu Sangui, under the escort of his own soldiers, rode his horse to the wall of Nanguan City. Ten miles away is the old dragon head sea city, at night, he can clearly see the old dragon head sea city and the bright lights on the mountain.

Wu Sangui's Guanning Army had never fought head-on with the Xuanjia Army, and his understanding of the strength of the Xuanjia Army was only hearsay.

The Xuanjia Army did defeat the Manchu Eight Banners in Shandong and Liaodong. However, in Wu Sangui's view, it was a guerrilla war, a harassment war, and the Manchus were caught off guard. If you fight head-on with the Manchus, you will rely on real swords and guns, and guerrilla warfare, harassment warfare, or anything will not work. It is difficult to predict whether the Xuanjia Army can still have an advantage.

As for the Xuanjia Army's destruction of the Zheng clan in Fujian, it was because the naval division was strong and had nothing to do with land warfare; The defeat of the Zuo Liangyu group in Jiangxi was also because Zuo Liangyu was just a group of bandits, how could his combat power be comparable to that of the Manchu Qing Dynasty?

Defeating Li Zicheng's 300,000 troops and Sun Chuanting's 200,000 Ming troops was a convincing record. However, there is still a considerable gap between the combat strength of Li Zicheng and the Ming army and the Manchu Qing Dynasty. If the Manchu Eight Banners and 80,000 troops outside the customs are changed, it is estimated that it can be done. Hong Chengchou, the governor of the ten provinces of that year, suppressed bandits in the Guan, and didn't he have a Songjin fiasco when he arrived outside the Guan?

Wu Sangui looked at the old dragon head Haicheng from afar, and in his heart, the combat power of the other party's original Xuanjia army was indeed bottomless. If the Xuanjia Army met the Manchu Eight Banners and was defeated in a battle, then he really got on the thief ship and couldn't cry.

A cold night wind hit, blowing Wu Sangui couldn't help but shiver, a flash of inspiration suddenly flashed in his mind, it is better to see than to hear, since he can't figure out the combat power of the Xuanjia Army, it is better to make an appointment to fight the Xuanjia Army to fight a small-scale battle, and you can know the strength of the Xuanjia Army.

In this tentative battle, you can decide which side to vote for this point of military strength, and which side to surrender!

Wu Sangui already had a plan in his heart, and hurriedly found Zhou Jian, the messenger sent by Fang Yuan, and asked him to go back and talk back to Fang Yuan. Both sides were the armies of the Ming Dynasty, and the soldiers met each other, but they cheapened the Manchu Eight Banners outside the Guan. It is better for the two sides to fight a battle on a stone south of Shanhaiguan, and each send a thousand of the strongest troops to fight.

If the Guanning army wins, Fang Yuan will immediately withdraw his troops from Laolongtou Haicheng and go to Gyeonggi, so as not to interfere in the war between Shanhaiguan and the Manchus. If the Xuanjia army wins, Wu Sangui is willing to surrender and fight with Fang Yuan in the Eight Banners of the Manchu Dynasty.

Zhou Jian was hung in Shanhaiguan for two days and two nights, and he was still worried, worried that Wu Sangui would suddenly surrender to the Manchu Qing Dynasty and cut off his head to sacrifice the flag.

But seeing that Wu Sangui suddenly ordered him to go back to Fang Yuan to make an appointment, no matter whether the two sides could negotiate or not, he also escaped from the tiger's mouth, and hurriedly responded, and went out of the customs to report to Fang Yuan.

On the one hand, Wu Sangui ordered Zhou Jian to go to Fang Yuan to make an appointment, and on the other hand, he also invited the Manchu envoy Fan Yongdou to watch the battle with the army. He was delaying time with the Manchus, pretending to agree to the Manchus' persuasion to surrender, and was willing to send troops to fight the Xuanjia Army first.