Here, the Mongolian navy is still adjusting the formation of the fleet, and the Thunderbolt navy is the first to move. Huang Dagen first ordered people to rush to the Mongolian convoy in a small boat seized from the water bandits. These small boats were already running fast, but at this moment they were going down the water, and in a short time they rushed close to the Mongolian fleet. Before the Mongols could release their arrows, the Thunderbolt soldiers in the boat jumped into the water and swam to the escort boat that followed. They lit the boats before they jumped, and they were filled with firewood and grass, sprinkled with grease and gunpowder, and in an instant they approached the Mongol fleet with a raging fire. The scorching fire caused the Mongolian ships to avoid one after another, and some frightened people jumped directly into the water to flee for their lives, and they were in a hurry for a while. Before the surrender of these Mongolian troops, they were also the elite of the Song army's naval divisions, and there was also a solution to deal with this fireboat, and after several manipulations, these unmanned fireships did not cause any damage, and flowed downstream. In fact, Huang Dagen also knew that it was almost impossible to burn the Mongolian ships with these small fireboats, and his purpose was to disrupt the formation of the Mongolian fleet. Now seeing that the Mongolian fleet was in disarray, and that there were ships that collided with each other and were damaged due to panic, they launched a real killing move - a firearm attack.

Huang Dagen deployed four escort ships in front, followed by two light artillery boats, and sailed downstream towards the Mongolian fleet. When the two convoys staggered, first the muskets of the escort ships opened fire, and then a grenade cut the head and covered the face. Just when the Mongolian navy was dizzy, the close shooting of the light artillery boat made these traitor soldiers fall into blood, and the four flying shotguns not only knocked down the Mongolian army in front of the ship, but also hit the crowd on the boat behind without dissipation, and this wave of attacks made the Mongolian naval army lose one-third of its combat strength.

After the first wave of attacks, Huang Dagen commanded the fleet to rush downstream and block the retreat of the Mongolian army. The Thunderbolt escort ships were stuck in a favorable position, while the light gunboats turned their sides and fired another round of bombardment at the Mongol fleet. The Mongol fleet was now shrouded in gunsmoke, and many ships were out of control and were in the water, and turning the bow of the ship at this moment would obviously cause even more confusion, so they had to continue to sail upstream.

To say that this Mongolian fleet is not weak, they braved the artillery fire, adjusted their formation while going upstream, and it only took a short time to end the chaos, and then turned the bow of the ship and rushed towards the Thunderbolts. The Mongols also wanted to take advantage of the advantage of going down the river to turn the tables, after all, they still had close to twenty ships, while the Perak fleet only had a few warships. It was only a few rushes, and apart from the loss of more manpower, not even a single ship of the Perak Army was damaged. In the face of the counterattack of the Mongolian army, Huang Dagen's order was to bombard with artillery from afar, and wait for muskets and grenades at close range, and to fight with the soldiers of the special platoon. When fighting against the water bandits in Xuzhou, the Thunderbolt army was once embarrassed, in addition to the sneak attack of the water bandits and occupying a favorable formation, but also because of the large number of water bandits, the will to fight is also tenacious. On the other hand, in this battle, the Mongolian army had many ships but only about 300 people, and the Thunderbolt ships were few but large, and the number was only a few dozen fewer than the Mongolian army.

Just when Huang Dagen was about to launch a general attack and annihilate the Mongolian fleet in one fell swoop, a mighty fleet appeared far away in the upper reaches of the river, with more than 100 large and small warships, which was naturally the water army of Diaoyu City, which made the Mongolian army even more desperate. Seeing that the hope of escape was lost, the Mongol army surrendered without waiting for the ships to approach. It has become a habit for these traitor troops to surrender, and as for the integrity and the like, it is really nothing compared to a small life.

As soon as the Diaoyu City ships arrived, Ouyang Xuan ordered the Mongolian ships and prisoners to be handed over together, and he took Huang Dagen to meet the leader of the Diaoyu City fleet. Unexpectedly, this leading general was unusually young, his face looked much more immature than Ouyang Xuan, and he should be under twenty years old. As soon as the two sides exchanged pleasantries, Ouyang Xuan knew that he was Wang Li, the anti-Mongolian hero who was destined to be famous in the history books. In Ouyang Xuan's memory, history records this famous general as follows: Wang Li, the last defender of Diaoyu City, was a resourceful, brave and warlike general, who had repeatedly defeated the Mongolian army; Three years after the fall of the Southern Song Dynasty, in order to save the lives of 100,000 soldiers and civilians in the city, he submitted a letter of surrender to the Mongols despite the infamy of his life. There was a great controversy about Wang Li in later generations, some people thought that he was a traitor when he surrendered to Mongolia, and some people thought that he did not hesitate to bear the infamy to protect the lives of the army and the people, and he was a real parent official. In Ouyang Xuan's eyes, Wang Li is a real hero, and if he uses 100,000 soldiers and civilians to die for the corrupt Southern Song regime, it will be a pedantic and evil act.

The enemy of the enemy is a friend, although Wang Li did not know the origin of Ouyang Xuan and the others, but seeing that they were beating the Mongolian army, it was natural that they would not be wrong to be friends or enemies, so he immediately invited Ouyang Xuan to take a boat to Diaoyu City. The age difference between the two is not much, and they cherish each other. Ouyang Xuan admired the heroes of Meng, so he naturally met each other frankly; Wang Li saw that Ouyang Xuan had an extraordinary bearing, talked and had lofty knowledge, and heard the history of the thunderbolt army's hard work, and couldn't help but admire. The more the two talked along the way, the happier they became, and for a while, they hated to see each other late.

Before I knew it, the boat had sailed close to the Diaoyu City of Hezhou Zhishuo. In the second year of Chun of the Southern Song Dynasty (1242), Yu Jue, the military minister, the Sichuan pacification envoy and the prefect of Chongqing, adopted the suggestions of Ran Jin and Ran Pu brothers to build the Diaoyu Mountain in accordance with the strategic defense idea of "combining the city and the fortress, and combining the military and the government". This Diaoyu Mountain is surrounded by the Jialing River, the Fujiang River, and the Qujiang River on three sides, and the situation is steep, leaning on the sky and the earth, standing on one side, and only the east side is connected with the land. The huge pincer-shaped river on the water surface constitutes a moat about 20 kilometers long, with rocky rivers and rocks, and the treacherous water conditions, while the steep mountain bank and open environment on land add to the steep trend of "leaning on the sky and standing on one side" for this not too high platform. Ouyang Xuan, who was standing at the dock of the Diaoyu City Naval Army, finally understood why the Mongolian army stopped here.

Wang Li and Ouyang Xuan got off the boat, and saw the Thunderbolt soldiers following behind, he was still full of enthusiasm just now, and he suddenly stopped, and looked at Ouyang Xuan without saying anything. Seeing his embarrassed face, Ouyang Xuan asked the reason. It turned out that in this extraordinary period of war, in order to prevent the Mongols from investigating the truth and pretending to be the Song army from sneak attack, Diaoyu City did not allow people of unknown origin to approach Diaoyu Mountain, let alone enter the city. Although the Thunderbolts were guest troops, they could only stay near the docks except for those who led the army. Even Ouyang Xuan needed to hand in his sidearm before he could enter Diaoyu City.

"This was personally drawn up by the king's system, and the lower officials did not dare to overstep it," Wang Li added apologetically. Hearing this, Ouyang Xuan said with a straight face: "This is natural, we will strictly follow the order of the king's rule." The king system in the mouth of the two is Wang Jian, the governor of Hezhou and the defender of Diaoyu City, who is thunderous in the history books of later generations, and it is under his leadership that Meng Ge Khan died in Diaoyu City, changing the trend of world history. According to Wang Li, he was not in Diaoyu City during this time, and the city defense matters were temporarily replaced by his deputy general Zhang Jue. It is said that Zhang Jue is also a generation of famous anti-Mongolian generals in the history books of later generations, and after Wang Jian, Wang Li was in charge of the most important fortified city in Sichuan.

After Ouyang Xuan instructed everyone to follow the requirements of the defenders of Diaoyu City, he and Huang Dagen followed Wang Li to Diaoyu Mountain City.