What the caravan brought back this time, in addition to the things that other caravans would purchase, there was also the "Jibeibu" that Lin Sen had specially explained that he must prepare more, this name must be unfamiliar to everyone, in fact, it is just a common cotton cloth in later generations.

Some of the things that Lin Sen has seen say that this thing is not available in the Tang Dynasty, and some people use cotton as one of the inducements to attack Gaochang, saying that Gaochang is rich in this.

But according to Lin Sen, it is difficult to say whether Gaochang has cotton or not, but there is indeed one in Lingnan.

According to the records of the Book of Yi in the Later Han Dynasty, as early as the Eastern Han Dynasty, the Ailaoyi people in the southwest of China had begun to plant cotton, and cotton planting technology began to be introduced to Lingnan in the Eastern Wu Dynasty.

Wu Ren Wanzhen's "Nanzhou Foreign Matter Chronicles" records the process of cotton from maturity to processing into cotton cloth:

"Five-colored spotted clothes, made of silk cloth and ancient bei cloth. When this wood is ripe, the shape is like goose feathers, there is a nucleus such as a bead, fine silk cotton, people will use it, then cure its nucleus, but spin not weave, arbitrary small pumping, phase traction is not broken.

If you want to be a spotted cloth, you can dye it in five colors and weave it as a cloth. ”

It was not until the Song and Yuan dynasties that cotton weaving began to be widely used in the mainland, and in this respect, Lingnan was a big step ahead of the mainland.

Of course, Lin Sen didn't know it from the beginning, but he caught up with boredom and happened to meet him when he went to Panyu City to go shopping.

It's just that compared with the silk shops in the market, the shops selling Jibei cloth can almost be said to be crowded, and no one cares about it.

The reason is not difficult to understand, the textile industry is a distinctive industry in the Lingnan handicraft industry. The unique natural climate makes Lingnan textiles have the characteristics of many varieties and bright colors, and they have been known as "Island Yihui Clothes" since ancient times.

In the long-term practice of life, the people of Lingnan have woven a variety of fabrics according to local conditions and using various local plant fibers, including kudzu cloth, bamboo cloth, banana cloth, linen cloth and cotton cloth.

But this kind of thing, because it is a local specialty, and most of the people who wear it are ordinary people, as well as local people, so it is a little less valued.

Compared with the silk that fans are all over the world and even businessmen are eager to eat, this thing has a bit of a lower riba meaning, as if it is naturally at a lower level.

Moreover, just like the silk quilt was more popular in the south in later generations, rather than cotton quilts, the weather here in Lingnan is really too humid, and the moisture-absorbing and warm characteristics of cotton cloth itself have become the biggest disadvantage here.

No one wants to wear a piece of clothes that are always damp and wander around Lingnan, the taste is simply unmentionable.

It's probably like running a summer marathon in cotton clothes. Therefore, it is only natural that they will not be welcomed.

The rich people here like to wear silk, and the ordinary people who don't have money also prefer to wear linen clothes, or bamboo cloth clothes, which are breathable, cool, and easy to dry, but it's not much more comfortable.

Since such things as Jibeibu are not well-known in the south, and if they want the caravan to transport them to the north, naturally no one is willing to do it.

If you are in charge of the north-south trade, on the one hand, you will be able to ship back all kinds of imported goods that will be worth a hundred times the value, not to mention a million profits, anyway, it is a profitable business.

On the other side is the recognized Tukela in the south, and you will free up some of the hard-won transportation capacity, and instead of transporting imported goods that are destined to be valuable, you will try to see if you can turn those Tukela into gold carats? Obviously, none of the caravans here did this.

If Lin Sen didn't happen to know that this cotton cloth is indeed a very suitable fabric for use in the north, and it is also the most comfortable for children as intimate clothing, he would definitely not waste the precious transportation capacity of the caravan at home to transport these cotton cloths that I don't know if they can sell at a high price.

As for whether such cotton cloth can open up sales in Chang'an City, and lead the trend as always, Lin Sen doesn't care too much, as long as Ping An and Cheng Huaiyu are comfortable to use.

Hearing that the big ship that was related to whether he could return to his family as soon as possible was finally built, Lin Sen simply put aside everything at hand and ran to the shipyard not far away with his men.

The big ship that Lin Sen thought about was standing quietly in the water, and the small waves basically had no effect on it, and even the ups and downs were very small.

Because of the extensive use of top-notch hardwoods, the overall appearance is dull and dull, and from a distance, it looks like a steel beast with a top horn lying there.

Looking closer, this trimaran is more than one circle larger than all the sea ships that can be seen around Panyu at present.

But it didn't look bloated because of the presence of two auxiliary hulls, and the overall length was still a cut longer than the width, and the proportions were close to the hull of the Fukubune.

In the center of the bow of the ship is a terrifying skull head, which is directly taken from the visor used by Lin Sen and them, and it is also the most prominent part of the entire ship.

Underneath it were three sword-edged straight-forward bows, reinforced with both the main hull and the two auxiliary hulls, which would be dismembered into several pieces as smoothly as a large axe would split wood in the face of an enemy ship.

Facing downwards, below the waterline, there is also a protruding impact angle.

With the super hardness of white solid wood, even if the opponent's hull is iron-shelled, it can poke out a few holes, not to mention that these collision angles are all similar to three-edged structures, and the armor-piercing effect is simply not too strong.

These are just things that can be seen on the surface, but in fact, there are many real weapons hidden in the hull.

This time, Lin Sen almost put the several big killing weapons that he had on hand that could be used in naval warfare on this new type of ship that had placed countless efforts and expectations on him.

After the modification, the winding was much easier, and only two people were needed to shoot continuously, ballistas with guaranteed power and accuracy, and even some small trebuchets, all of which were stuffed into the sides of the hull with the help of his students.

Each big guy comes with a base that can be raised and rotated, as well as a fortress-like circle of guards, and under the protection of thick hardwood, it is difficult for enemy attacks to do little damage.

This kind of protection that can make the enemy desperate is reflected in every aspect of the ship, such as the high side of the main hull, or even the houseboat made of extravagant sandalwood.

But what really made them more powerful were the secret weapons that Lin Sen had at hand.

When these things really begin to wield, any enemy ship will tremble and despair in front of this new flagship!