Quy Nhon was once the capital of the ancient Champa state, which became an important town in southern Vietnam and an outpost south of the Mekong River after it was annexed by Vietnam.

At this time, Quy Nhon was occupied by the Tay Son Dynasty generals Chen Kuan Yao and Wu Van Dung, the two led the most elite 50,000 troops of the Tay Son Dynasty, because they evacuated the elite of the Tay Son Dynasty, which led to Nguyen Phuc Anh sneak attack on Phu Xuan success, the two were very angry, after occupying Quy Nhon, they wantonly attacked the nearby Nguyen Dynasty city, but unfortunately they were unsuccessful, guarding a lonely city, isolated.

At this time, Li Weikang came and told them that he was the orthodox Li Dynasty and asked them to be loyal. These two were die-hard loyalists of the Xishan Dynasty and told Li Weikang that they did not recognize anyone except Nguyen Quang Zhang.

As for Nguyen Quang Zhang, he had already surrendered at this time. Nguyen Quang Truong fled to Thang Long alone, intending to gather the forces here to fight to the death with Nguyen Phuc Anh in the south, but at this time the Chinese army appeared in the rear, the cities in northern Vietnam surrendered one after another, and the Yunnan Green Battalion drove all the way to Thang Long.

The reason why Le Wei Kang came to Quy Nhon was because he had already met with Nguyen Quang Zhang, and he learned from Nguyen Quang Yen that the Tay Son Dynasty still had a large army in Quy Nhon, so he took a warship and brought grain and grass to Quy Nhon.

Tran Kuan Yew and Vo Van Dung confirmed Nguyen Quang Truong's handwritten letter and ordered them to accept the command of Le Wei Kang, stating that they did not surrender, but surrendered to Zhengshuo, and the Lê Dynasty was the right.

When the two of them saw Ruan Guangzhang's handwritten letter, and Li Weikang was orthodox in the Li Dynasty, they didn't insist, sighed, and immediately knelt down to show their obedience.

After getting enough grain and grass, the army of the Xishan Dynasty still has the strength to fight, not to mention that in order to cooperate with Li Weikang, Zhou Lang insisted on taking Li Weikang all the way from Nanjing to Quy Nhon with the handsome camp that he was resting.

After that, Li Weikang wantonly surrendered and rebelled in the Quy Nhon area, playing the banner of Li Dynasty orthodoxy, but unfortunately the Li Dynasty had long lost its authority and had no appeal, and the surrounding cities did not respond to his surrender.

This is the best puppet, with righteousness in hand, but without prestige, there is no threat.

Leaving Ma Dalei to defend in Quy Nhon, Le Wei Kang immediately went north, at this time Nguyen Phuc Anh was still in Phu Xuan Anmin, and the navy of the Nguyen Dynasty went north to crusade against Nguyen Quang Zhang, and fought fiercely with the Guangdong pirate king Zheng Qi recruited by Nguyen Quang Zhang at Rili Haikou. Li Weikang went straight to the mouth of the Thuan An River, and he wanted to "recruit" Nguyen Phuc Anh.

Surrender is impossible, but negotiation is possible.

Ruan Phuc Anh refused to meet with Li Weikang, insisting that the last emperor of the Li Dynasty was dead and that the Li Dynasty had perished.

Li Weikang's representative is Zhou Lang's confidant Lin Di, who has been following Zhou Lang for so many years and has participated in negotiations with foreigners many times.

He told Ruan Phuc Anh that the Li Dynasty had not forgotten its demise, and it was not one of his courtiers who had the final say. However, he did not pursue these procedural issues, and he proposed that Nguyen Phuc Anh and Nguyen Quang Yen should stop the army, and Da Zhou would mediate them, just as the Qing Dynasty had mediated between the Zheng clan and their Ruan clan.

Ruan Phuc Anh dragged on for a few days, and only after knowing the situation of the battle between his sailor and Nguyen Quang Zhang's sailor from the north did he agree to stop his troops and accept mediation.

Zheng Qi, the pirate king of South China, led his subordinates to take 200 warships under the order of Nguyen Quang Yen to defend the Rili Haikou (Dong Hai), but the Rili Fortress on the shore was controlled by Nguyen Phuc Anh's army, which was the forefront of Nguyen Phuc Anh's forces.

In the history of this battle, Zheng Qi was defeated and died, and the old department was led by his younger brother Zheng Yi, and this Zheng Yi's woman is called Zheng Yi's sister-in-law, which is the prototype of the female pirate in the Pirates of the Caribbean. It was Zheng Yi who brought the remaining South China pirates to the pinnacle of history, and he formed an alliance with other pirates in Guangdong and made an alliance.

This Zheng Qi can be said to be the largest pirate force in Guangdong at present, but he was not active in Guangdong before, and has always taken refuge in the Xishan Dynasty, otherwise he would have been exterminated by Zhou Lang a long time ago.

This time Zheng Qi also encountered the disadvantage, Ruan Phuc Anh's naval general Ruan Van Truong raided the Rili Haikou and drove Zheng Qi into a desperate situation, who knew that at this time a powerful Chinese fleet suddenly appeared, the firepower was strong, the artillery of fifty ships was greater than the firepower of Nguyen Van Zhang's 1,200 warships (including 4 European-style warships, 40 large warships and more than 300 large rowing boats) combined, which instantly disrupted Nguyen Van Zhang's fleet, Zheng Qi seized the battle record, broke into the enemy formation, and defeated Nguyen Van Zhang.

Now it was Nguyen Phuc Anh who lost the water division and the rear was cut off by Quy Nhon, in which case it was the wisest option for him to agree to a ceasefire.

In such a situation, Nguyen Phuc Anh could only sigh, and could only say that Vietnam did not have a unified destiny. In fact, he can accept this situation.

From 1620 onwards, Nguyen Phuc Yuan, a powerful minister in southern Vietnam, officially refused to pay taxes to the court of Thang Long (Hanoi). It has been almost 200 years since Vietnam began to divide the north and the south. Ruan Phuc Anh's ancestors have always been in the south and have been suppressed by the north, whether it is comprehensive strength or righteousness, the Ruan family is at a disadvantage, if they want to be unified, it is also the north to unify, if he can be allowed to continue to secede, he will also admit it.

But the boundaries must change, which is also the core issue of his negotiations with Lindy.

In the past, the boundary between the Zheng clan in the north and the Nguyen clan in the south was on the Zheng River in Quang Binh Province, but now Nguyen Phuc Anh has basically controlled the traditional territory of the Nguyen clan, and some areas have broken through to the old sphere of influence of the Zheng clan.

To make him give up the war, then he wants more. He proposed that the two sides should use the Bac River (Red River) as the boundary, following the example of the Ming Dynasty in that year's favor of the Mo Dynasty before the Li Dynasty in Vietnam (the Ming Dynasty forced the Li Dynasty to hand over Gaoping, which was close to China, to the Mo Dynasty as the ancestral land for sacrificing the Jongmiao), and to use the north of the Bac River as the place of the Le Dynasty's Jongmiao. Later, at the beginning of the Qing Dynasty, the Mo Dynasty, who ruled Gaoping, stood on the wrong side, Wu Sangui was against the Qing Dynasty, he supported Wu Sangui (because he was grateful for the Ming Dynasty), and used Wu Sangui's era name to provide Wu Sangui with grain and grass. was finally killed by Li Chao, and Kangxi didn't say anything after that.

Ruan Fuying wants more, Zhou Lang still wants more, Lin Di knows Zhou Lang's bottom line, and also knows that Zhou Lang is very reluctant to have a war in the end, the Great Zhou has not yet been unified, so he will start a war with the Annamite, and the pressure of multi-front combat is too great, so he can make concessions and allow the Ruan clan to expand the old territory, but not too much.

Lin Di wanted to continue to maintain the territory of the past period of Zheng Nguyen's partition, with the north ruled by the Lê dynasty and the south ruled by the Nguyen clan, who were vassals to the Lê dynasty and called the Nguyen lords. Before the restoration of the Xishan Dynasty, the status quo was maintained for more than 100 years.

Nguyen Phuc Anh categorically did not recognize the Lê dynasty, saying that the Lê dynasty had perished. Ke Lindi believes that even if a king dies in the Li Dynasty, the clan has not perished, and Li Weikang is the clan and the righteous son of the previous king. The former king had no children, and Li Weikang was orthodox.

Ruan Phuc Anh suggested that he had gone to Beijing to investigate, believing that the former king had given up the throne, shaved his hair and changed clothes, joined the Manchu Qing Dynasty, and joined the Hulu to be worthy of being king.

The two did not negotiate, and Lin Di threatened that the Great Zhou had a million soldiers, and that Annan would never be allowed to seek to usurp the throne, and that the Li Dynasty would definitely be restored.

Ruan Phuc Anh said that he raised troops to fight against the Xishan bandits, not the Li Dynasty, and the Li Dynasty was destroyed by itself, and he did not think about plotting to usurp the throne.

After Lin Di left, Ruan Phuc Anh fell into deep thought.

Without the recognition of the Central Plains Dynasty, his legitimacy cannot be guaranteed, the other party is now supporting the Li Dynasty, if he expresses his recognition, the Great Zhou will take the opportunity to weaken him, the Ruan and Zheng can fight for more than a hundred years, it is because the Manchus did not interfere, if the Manchus intervene, whether it is the Ruan or the Zheng, they are powerless to fight.

Now he can't tell the purpose of the Great Zhou to support the Li Dynasty, but he knows that his strength is impossible to fight against the Central Plains Dynasty.

He hoped that Zheng Huaide would send back good news from Nanjing, change the attitude of the Great Zhou Emperor, and not intervene in the Annan dispute.

At this time, Zheng Huaide already knew that the Great Zhou supported the descendants of the Li Dynasty, and he, like Ruan Fuying, resolutely refused to recognize Li Weikang.

He wants to fight for a legal status for the Ruan Dynasty, and if he really can't get it from the Central Plains Dynasty, then he can only stand on his own.

He has the same attitude as Ruan Phuc Anh, at most, he can only accept the control of one or two provinces in the border area with China to the descendants of the Li Dynasty, but he will never recognize that the Li Dynasty is orthodox, and he hopes that the Ruan family will replace the Li Dynasty, just like the relationship between the Li Dynasty and the Mo Dynasty during the Ming Dynasty.

Zheng Huai Duc is more stingy than Nguyen Phuc Anh, Nguyen Phuc Anh is at least willing to take out the land north of the Red River, Zheng Huai Duc is only willing to give Gao Bang Mansion and a few other small places, Vietnam's Gao Bang Province, later generations they changed its name to the province, in fact, it is not even the size of a county in China.

Zhou Lang was angry and gave an ultimatum, telling Zheng Huaide that his attitude was to restore the old Li Dynasty, Ruan Fuying agreed, and if he didn't agree, it would be a rebellion, and the Great Zhou would help the Li Dynasty to quell the chaos.

Then he appeased him, considering that Nguyen Phuc Anh Binh was a thief in the west and could let the Li Dynasty canonize a few more fiefs to him, Zhou Lang told Zheng Huai Duc that he could let the Li Dynasty take Ha Tinh, Nghe An and Thanh Hoa provinces north of the Nguyen family's old land.

When Zheng Huaide heard this, there were more places in the three provinces, especially Thanh Hoa Mansion, but it was a big mansion with a large population and fertile land, but he didn't dare to agree, he said that he would go back and ask Lord Ruan.

The news brought back by Zheng Huaide made Ruan Phuc Ying quite flexible, in fact, if he gave him Ha Tinh Mansion and Nghe An Mansion, he would be content, but he didn't expect that there would be another Thanh Hoa Mansion.

But as soon as he heard that it was in the name of canonizing the Li Dynasty, Ruan Fuying felt very unsteady, and if he recognized the Li Dynasty, he always felt that there was some danger lurking. There is no doubt that the Li Dynasty is controlled by the Great Zhou, and he admits that if the Li Dynasty is spoken, will the Great Zhou use the name of the Li Dynasty to ask him about his guilt in the future.

The name of the crusade is always very easy to find.

Ruan Phuc Anh thought about it for a long time, and he decided that as long as Da Zhou was willing to canonize him as the king of Annam, he would be willing to accept this clause, as for the Li Dynasty, how did Da Zhou Ai settle down.