On the one hand, he asked Yuan Chonghuan to sell firearms to Mo Jingkuan, and on the other hand, he asked Jiang Dejing to sell warships to Nguyen Phuc Yuan.

When Mo Jingkuan's second request for tribute was refused, he lost patience and sent Nguyen Qi and Nguyen Minh Shi to attack Hue under the command of Ming instructors, and then continued to Quang Nam. Nguyen Phuc Nguyen originally hid in Phuoc An near Hue for retirement, and all government affairs were decided by the head town of Nguyen Phuc Khi. In the face of the mutation, he panicked, and with the "skillful" help of Jiang Dejing, he fled back to Da Nang by sea, and immediately regained power and organized a counterattack.

Although Mo Jingkuan's army was superior in numbers and advanced in firearms, Nguyen Phuc Nguyen repeatedly saved the danger on the basis of favorable terrain and supply advantages, and it was still difficult to distinguish the winner from the defeat after more than four months of melee.

In this war in which rookies pecked each other, the army generals led by Yuan Chonghuan, Sun Chuanting, and Huang Degong sent hundreds of instructors to assist Mo Jingkuan, while Jiang Dejing, Shen Shou Yao and other naval elites stood on Nguyen Phuc Yuan's side, and they all experienced the entire war as instructors, and had a clear understanding of the arms, equipment, and tactics of South Vietnam and Quang Nam, and took the opportunity to draw detailed military maps that could take over the battlefield at any time. Flash Dance

As soon as Ruan Qi and Ruan Mingshi's army retreated to the north of the Zhengjiang River, Zhu Youxiao ordered Yuan Chonghuan to inform Mo Jingkuan and ask for an army to attack Quang Nam, but before he could respond to Yuan Chonghuan's army, he deliberately crossed the Ma River near Thanh Hoa, so frightened that he almost fell off the city wall. At the beginning, after the Ming Dynasty and South Vietnam established a border with Fenghua, they ordered Mo Jingkuan to build the capital in Thanh Hoa, which was only more than 50 miles away from the border.

Of course, Nanyue is now a buffer zone of the Ming Dynasty, and the two sides are in a suzerain-vassal relationship, Zhu You did not have any idea about it, and this march from Thanh Hoa was to take the opportunity to deter Mo Jingkuan, and second, it was convenient to cross the river here. In order to prevent Nguyen Phuc Nguyen from jumping over the wall and escaping from the sea, he needed to push into the hinterland of Quang Viet as soon as possible, and at the same time ordered Chiang Duc King and others to blockade Da Nang, Hoi An Port, etc., to cut off Nguyen Phuc Yuan's connection with Portugal.

Due to the large number of rivers in South Vietnam, Yuan Chonghuan's army marched slowly, delaying by at least twenty days than expected, which greatly annoyed Zhu Youxiao, who was also the commander-in-chief of Pingnan, and slapped the table and yelled at Sun Chengzong

"This is the immortal material that the Taishi recommended to me? He Yuan Chonghuan has been operating in Guangxi for many years, asking for money for money, asking for grain for food, and boasting all day long that he has formed a wolf army, but now he does not dare to give a head-on blow in the face of the Guangyue army like a frightened bird, I see that no matter how many wolf cubs let a sheep command or a flock of sheep! ”

In the face of the emperor's reprimand, Sun Chengzong's old face turned black, and he couldn't wait to find a crack in the ground to get into. Flashing his life, it can be described as a peach and plum world, to say that he is the most proud of Zhu Youxiao, followed by Yuan Chonghuan. In order to give his disciple some privileges, Sun Chengzong would take extra care of him every time he was rewarded, and even incorporated the Guangxi wolf soldiers into the special forces sequence, as the sharpest sword of the Ming Dynasty. Under the fame, Yuan Chonghuan was dragged down by this, so he led tens of thousands of wolf soldiers to march south step by step, not daring to slack off in the slightest. Sun Chuanting and Huang Degong, who could cross the river from Jianping, had already entered the territory of Guangping, and the forward troops even crossed the Zhengjiang River to engage the defenders of Guangyue several times.

Of course, Sun Chengzong understood Yuan Chonghuan's situation, but he still had to take care of the emperor's emotions, and he was in a dilemma for a while, so he had to kneel down and plead guilty

"The Holy One is angry, don't hurt the dragon's body. Yuan Chonghuan's troops marched south from Thanh Hoa, not only to avoid the open guns of Guangyue, but also to beware of the hidden arrows of the Mo Dynasty, and the march was understandably slow. Lao Chen asked the military department to send 600 li to expedite, and let Yuan Chonghuan's department quickly insert it into Hue, otherwise it would be done by military law. ”

The person who let Yuan Chonghuan cross the river from Qinghua was Zhu Youxiao, and his original intention was to intimidate Mo Jingkuan by force, so that he could be a good emperor in the rear. Sun Chengzong saw through it or not, Zhu Youxiao also had self-knowledge, and said in a soothing tone

"Yuan Chonghuan is a general personally ordered by me, and it is reasonable to say that he is cautious, but the battlefield is ever-changing, and the fighter plane is fleeting, and I still hope that he can go to the front line as soon as possible. Guangyue's palm-sized place, if he doesn't hurry up, I'm afraid he won't even be able to drink the soup, and when the time comes, he will hold the world's first wolf soldier but have no size, even if I want to be biased, it will not help. ”

Zhu Youxiao's words soon reached Yuan Chonghuan's ears, and his face suddenly became very ugly. Yuan Chonghuan led 60,000 wolf soldiers from Qinzhou on this expedition, with high morale and well-equipped, almost crushing all the way into the territory of Guangyue.

With the elongation of the battle line, the pressure on logistics and supply became more and more great, and the soldiers were a little unaccustomed to the soil, and he was very worried about the confusion of the army after being ambushed by Nguyen Phuc Yuan, so he ordered to slow down the speed of the march. Now that Zhu Youxiao personally admitted that Yuan Chonghuan was his general, that is, he admitted that Yuan Chonghuan was his confidant, and it was impossible for Yuan Chonghuan to hide behind and wait for ready-made products, so he hurriedly called the herald and ordered the army to rush to the aid of Sun Chuanting and Huang Degong in Hue.

After fighting with Mo Jingkuan in Da Nang for several months, Nguyen Phuc Yuan had already exhausted Quang Viet's national strength, and now in the face of the Ming Dynasty and the four-nation alliance forces of Siam, Champa and Chenla, he knew that he was unable to deal with it, and sent envoys to Cam Ranh Bay to negotiate peace with Shang Zhou Zuo, but Shang Zhou Zuo refused on the grounds that Quang Viet was not a vassal of the Ming Dynasty.

At this time, Ruan Fuyuan hated Tao Weici so much, if he hadn't listened to his slander, he wouldn't have ended up like this. Tao Weici believes that Guangnan has the danger of mountains and rivers on three sides, and the territory is rich in gold, silver and iron ore, and there are fishing and salt drying by the sea, so it has unique geographical advantages. In addition, the Ming Dynasty has always regarded South Vietnam as a country that does not conquer, and will not easily send troops to conscript, let alone garrison for a long time, as long as it avoids its edge, and can continue to be the king and establish a forever business after a few months of dealing with it.

Tao Weici's strategy was indeed very good, but he underestimated the ambitions of the Ming emperor, and since the conquest of Japan, South Vietnam and even Southeast Asia have become the new targets of the Ming Dynasty. He once strongly persuaded Nguyen Phuc Yuan to absorb the pirates of the Ming Dynasty, illegally occupy islands and reefs, and plunder passing merchant ships, which made Zhu Youxiao determined to fight back against the invasion of South Vietnam as soon as possible and calm the turmoil in the South China Sea. After the destruction of Thang Long, all the Zheng family was executed by Mo Jingkuan, and a puppet regime was established that was completely subordinate to the Ming Dynasty.

Now the Ming Dynasty entered the territory of Guangyue again in the name of exterminating the sea trouble, Tao Weici said that the danger of mountains and rivers lost its strategic depth under the attack of the Ming Dynasty's three-way army, and the gold, silver, iron ore and salt fields were offset by the Ming army.

In this campaign, the Ming Dynasty dispatched a total of 110,000 troops and 40,000 navies, basically wiped out the Nguyen clan in Quang Nam and Tay Son, and slaughtered Tao Weici, who instigated Guang Viet to confront the Ming Dynasty, which not only completely rewrote the dispute between Zheng and Nguyen in Vietnam, but also reincorporated South Vietnam into the territory of the Central Plains Dynasty.