In fact, cotton crops were available in the Han Dynasty, but people regarded him more as an ornamental plant, until the period of the Northern and Southern Dynasties, the history books also clearly recorded: there is grass in the ground, it is like a cocoon, and the silk in the cocoon is like a fine silk, which is called Bai Diezi. The people of this era did not yet realize the economic value of cotton, and the clothes worn by the people were all made of silk and linen, the gentry and wealthy families wore silk and satin, and the common people wore coarse linen clothes.

The climatic conditions of Shu and Nanzhong determine that people here do not need to wear too thick clothes for the winter, and the Shu Han officials do not store enough winter clothes, even in the cold north, the soldiers only wear clothes filled with hemp wool in winter, because the warmth of hemp wool is too poor, so there is only a thickened thermal layer, so the soldiers' winter clothes look very bloated. Those with better conditions wear animal skins to keep warm, but both the fur of wild animals and the fur of domestic animals are expensive things, and it is difficult to spread them on a large scale.

Therefore, in the north, where the water is dripping into ice, it is generally not necessary to use soldiers in the weather of Sanjiu, and at this time to fight, because the non-combat attrition of freezing to death and frostbite is often greater than the loss of war.

The biggest difficulty in crossing the snow-capped mountains is the low temperature and cold, and doing a good job of cold protection and keeping warm is the primary condition, and now there is a shortage of winter clothes, Liu Yin must find a way to solve this problem, otherwise more than 30,000 people and horses will be frozen to death halfway through.

Although animal skins are a good choice, and there are a lot of beasts in the southern and central regions, it is obviously unreliable to make leather clothes that can meet the needs of 30,000 people in a short period of time, but these animal skins can be purchased in large quantities for making boots, leather hats, gloves and other items, as bulk winter clothes. You'll have to find another way.

Liu Yin thought of the silk quilt he had covered in his previous life. It's light and thin. The cold-proof effect is better than cotton, the brocade industry in Shu is developed, and the raw material of Shu brocade is not silk? Liu Yin immediately sent someone to check in the official warehouse, sure enough, there were tens of thousands of catties of raw silk stored in the official warehouse, when he retreated from Chengdu, these raw silk and more than 200,000 horses of brocade silk were transported to Nanzhong together, in this era silk and grain and grass even more than gold, silver and copper coins have a value preservation function, war years. People would rather barter than ask for money, and silk was the real "hard currency" at the time.

Liu Yin unceremoniously smiled at the tens of thousands of catties of raw silk, Liu Chan has already let go, make the best use of people, make the best use of things, such support makes Liu Yin very grateful, who said that Liu Yin is mediocre and incompetent, at a critical moment, there is still a virtuous side.

It takes about a pound of raw silk to make a winter coat. Obviously, the inventory in the official treasury was not enough to equip the whole army, so Liu Yin paid a high price to buy silk from the people. However, Liu Yin did not come forward. Instead, it entrusted several commercial houses to make acquisitions, and in addition to silk, animal skins and animal meat medicinal materials were the objects of its purchase.

Shu brocade is the economic pillar of Shu, almost every household grows mulberry and silkworm to take silk brocade, the southward migration, real estate is not taken away, but silk brocade grain is a must for every household, so the acquisition of silk is very smooth.

However, using silk to make winter clothes is also luxurious enough, but fortunately, Liu Yin scavenged a lot of treasures from Huang Wuhao, and it was more than enough to deal with it.

Liu Yin did not use the official name, just to prevent the spies of the Wei State from following the map, relying on these clues to see through his plan, and buying it in the name of a private firm will not arouse the suspicion of others, Liu Yin is very cautious in this regard.

After the purchase of silk hides, the processing sites are also scattered, and a batch of them is shipped out and directly transported to Hanjia.

Animal meat is also processed into jerky, which is easy to carry. Although there is a shortage of food now, no matter how short it is, there can be no shortage of military food, and the emperor is not short of hungry soldiers, Chen Shou rushed to Hanjia and has raised at least two months of grain and grass for the 30,000 army. However, Liu Yin knows that when climbing over the snow-capped mountains, people's physical exertion is extremely great, and it is difficult to replenish the calories consumed by grains alone, and only high-calorie animal protein can meet the demand. In addition to purchasing some wild beasts captured by hunters, Liu Yin also ordered people to slaughter a lot of pigs and sheep, all of which were made into portable jerky and transported to Hanjia.

In addition to winter clothes and food, there are indeed many things to prepare, and the list listed by Liu Yin in the plan alone is a long list, and Liu Yin handed over these miscellaneous things to He Pandu Zhen to deal with, with the talents of the two, it is a bit overkill.

The firearms workshop had just arrived in Nanzhong, and before they had time to select a site for reconstruction, Liu Yin decided to take them with the army and take them to Longxi. Firearms are the most important weapons that Liu Yin relied on, although in Chengdu, the firearms workshop still had some inventory, but all the way to the south, production has been at a standstill, after arriving in Nanzhong, there is no time to rebuild in a short time, so there has been no output. Liu Yin must take away the current inventory of firearms, but after arriving in Guanlong, the big war must be indispensable, and Liu Yin can't say how long this igniter can last, but Nanzhong and Guanlong are far away, and it is a problem to replenish them after they run out, so Liu Yin simply took the entire firearms workshop away, fortunately, the firearms workshop did not have much bulky equipment, mainly craftsmen, with these craftsmen, it was easy to remake gunpowder when they got the raw materials.

This time to the north, many heavy materials Liu Yin did not consider carrying, because whether it is a snow-capped mountain or a meadow, heavy vehicles are impassable, in addition to relying on manpower, the rest can only rely on animal power, for which Liu Yin prepared some horses and mules, specially to transport food and materials, at a critical time, these horses and mules can also become food.

After more than ten days of intense preparations, Liu Yin finally completed all the preparations, he immediately entered the palace to Liu Chan to say goodbye, ready to go to Hanjia, on the bright side, Liu Yin's letter to Liu Chan is to play to go to Hanjia to defend against the enemy, and wait for the opportunity to recover Chengdu.

The plan to march into Hanjia did not receive the slightest resistance in the Shu Han Dynasty, Hanjia is not only the only way to Chengdu, but also the gateway to defend the south, Liu Yin marched into Hanjia, there is a strategy of attacking instead of defending, although migrated to Nanzhong, but the Shu people still have deep feelings for Shu, all thinking that one day they can restore the old land, return to their hometown, Liu Yin went north, it seems that there is some meaning of counterattack, the vast majority of the southward migration of the military and civilians still expressed considerable welcome.

At the same time, Liu Yin also asked Liu Chan to play, it was time for Liu Sui, who served as the supervising army, to accompany him on the expedition. (To be continued......)