Pang Tong's words brightened Huangfu Chaobo's eyes. He suddenly remembered what Mi Zhen had said on the ship when she first arrived in Qingzhou. When she was a child, she had been out of the sea with Mi's fleet. In the sea to the east of Qu county, there was a big island called yuzhoushan Island, which is said to have been occupied by a group of pirates.

Referring to yuzhoushan Island, Huangfu Chaobo suddenly thought of another name: Tianheng island. That is the location of Lianyungang in reality.

Yuzhou is an ancient name in China. It is said that Tian Heng lived here in the late Qin Dynasty, so it is also known as Tian Heng island. In today's Lianyungang City, Jiangsu Province, East Yuntai mountain area. In ancient times, in the sea, "Zhou Hui Bai Li" (Annals of States and counties in the book of the Southern Qi Dynasty). In the Qing Dynasty, because of coastal expansion, it began to connect with the mainland. At the end of the Eastern Han Dynasty, Bing yuan entered the sea and lived in Yuzhou mountain.

It's true that Qingdao is more than 400 miles away from yuzhoushan island. It happens to occupy this island, making it a turning point for the navy to go south to Jiangdong.

From Yuzhou mountain to the south, you need to walk more than 800 Li. It seems that you need to find another island near the huaishui estuary.

Thinking of this, Huangfu Chaobo quickly asked Jiang Qin to send people to go south first to explore the situation on yuzhoushan island. If there are still pirates, they will take it and occupy the island this time.

As Huangfu Chaobo had expected, three days later, the fleet met the ship that had been sent out earlier on the sea 60 miles to the north of yuzhoushan island. The red horse boat of the Nu Tao army pulled in from a place in the northeast corner of yuzhoushan Island, and then sent several elite sailors to explore the whole island carefully.

Yuzhoushan island is to the east of Qu county in Xuzhou, about ten miles away from the coast. The island is irregular and long, about 20 Li long from northeast to southwest, and less than 10 Li wide from northwest to Southeast. The mountains on the island are undulating, and there are several mountains about hundreds of feet high. The mountains are densely wooded, high in the northeast and low in the southwest.

Chihou boarded the island from the foot of a cliff in the northeast, and then crossed the mountains to the south of the island. In the south of the island, the terrain is relatively high in the west, and the trees are luxuriant. In the East, there is a large flat land several miles around.

After observing the mountains for half a day and one night, the Marquis Chih has basically figured out the situation on the island.

On the southeast plain, there is indeed a group of pirates. It seems that there are at least thousands of them. Their ships are parked in a small harbor in the southeast of the island. There are about 20 ships, and there are several ships in it.

The reason why Chihou was sure that it was a sea going ship was that they had never heard of it or seen it in the army. Compared with the ships of Anton water army, those ships were wider and shallower. There was not much pulp on both sides, but there were several sails on them.

After listening to the report of Chihou, Huangfu Chaobo was basically sure that the ships found by Chihou were what people often call sand ships. This is one of the four famous ships in ancient China, and also the longest existing sea ships, mainly used for offshore navigation and inland navigation.

However, it is said that sand boats first appeared in the Tang Dynasty, but I don't know why they appeared in the game of the Three Kingdoms. It's just that Huangfu Chaobo was surprised but very happy about the appearance of sand boats.

The sand boat has a square head and a square tail, commonly known as the "square boat"; the armor plate is spacious, small in shape depth, and low in freeboard; the girder arch is used to make the deck discharge waves quickly; the "out of the boat" is convenient for installing the elevator, and the "empty boat" is convenient for operating the awning. The ship is equipped with multiple masts and sails, with fast speed, large rudder area and ability to lift. When going to sea, some rudders fall below the bottom of the ship, which can increase the rudder effect and reduce cross drift. When meeting shallow water, the rudder can be raised.

The structure of the sand boat is unique, with square head, square tip, flat bottom and shallow draft. It is wide, large, flat and shallow. The bottom is flat, and it can sit on the beach. It is not afraid of stranding and shallow draft. It is less affected by the tide. The sand boat has many masts and sails, high mast and high sail. With shallow draft and low resistance, it can sail at high speed on the sea and has good seaworthiness; The carrying capacity is large. It is generally recorded that the carrying capacity of sand ships ranges from 4000 to 6000 stones.

You know, Huangfu Chaobo's Dagao has a maximum carrying capacity of 3000 stones, and it has sunk in the sea several times. Another reason is that sand boats are very suitable for sailing in the northern waters, because their ability to resist wind and waves is still a little lacking. They are not suitable for the strong wind and waves in the southern sea, but they are just the ships that Huangfu Chaobo needs.

At the thought that there would be a big ship that could adapt to the sea and inland rivers, Huangfu Chaobo could not help but look forward to it. He did not know whether there were any ship builders who knew how to build sea ships among the pirates. It would be best if we could bring in a few craftsmen to build ships. If not, at least we should capture these sand boats.

Thinking of this, Huangfu Chaobo called Jiang Qin to take charge of the war.

After receiving orders, Jiang Qin left the warship of Huangfu Chaobo and returned to his own warship to arrange the war. Although Anton's navy was only an inland water army, it was not afraid of such offshore operations.

Half an hour later, after Jiang Qin left two building ships to guard Huangfu Chaobo and his transport ships, he led the majority of the navy to yuzhoushan island.

After Jiang Qin's army left, Huangfu Chaobo couldn't stay any longer. He hadn't seen the naval battle yet, but the building ships could catch up quickly, but the speed of the building ships full of horses and goods couldn't be improved.After a little consideration, Huangfu Chaobo decided to leave three building ships to guard the merchant ships, and led one of them to see the naval battle from a distance.

After Pang Tong's persuasion failed, he had no choice but to agree. However, the personnel and materials on the ship had to be adjusted. Dian Wei arranged 400 soldiers of Tiebi camp and 600 soldiers of Yuanrong crossbow on the ship of Huangfu Chaobo. The remaining 400 crossbow soldiers were assigned to the other three ships to guard the caravan.

Some other unimportant materials were moved from Huangfu Chaobo's ship to other ships to increase the speed and flexibility of the ship. After a lot of instructions from Dian Wei and Shi a, Huangfu Chaobo was allowed to pursue Jiang Qin's fleet.

However, in the process, Pang Tong thought a little more carefully, deliberately slowing down the speed of the soldiers, but Huangfu Chaobo didn't find these details.

After the exchange, more than an hour has passed.

When Huangfu Chaobo and Jia Jing catch up with Jiang Qin's fleet full of curiosity, they find that their sea war is over. Jiang Qin has led the soldiers to the island. Outside the port of the island, there are floating ship fragments everywhere, and even some pirate bodies are floating in the sea with the waves.

But the loss of Nu Tao camp was very small, only a few smaller ships were injured, and dozens of soldiers were killed.