Liu Bei was really worried about Wei Yan, and he was bitter and earnestly taught Wei Yan, but the problem is that Wei Yan is not a child.

A person, who has lived for more than 40 years, has already been completely stereotyped in his temper and character, and no matter how much persuasion he is, it is impossible to change it.

Wei Yan saw Liu Bei, and he could still maintain respect and respect, but when he left the gate of Liu Bei's mansion, what should he do.

No matter what Wei Yan's temper was, Wei Yan's ability to lead the troops into battle was beyond doubt, and after accepting the military order, he immediately took over the training of his subordinates and began to prepare for a surprise attack on Chen Cangdao.

And Zhang Xi and others also began to prepare to march into Baochuan Road, and sent an urgent messenger to inform Zhao Yun, so that Zhao Yun could choose the opportunity to send troops and march into Sanguan within October.

The first step of the whole strategy is to attract the main force of Cao's army in Chang'an to deploy along the Weishui coast as much as possible, so the soldiers and horses of the Longshan Road and the Baochuan Road must set off in advance to fight a deterrent.

And Wei Yan's troops and horses were limited by the narrowness of Chen Cangdao, coupled with the requirement of rapid advance, the troops could not be too many, and they could only carry about 20,000 people, so they had to wait until the Cao army was unable to support before launching an assault.

Therefore, Wei Yan still had to stay in Hanzhong for the time being to supervise the soldiers, while Zhang Xi and others had to accompany Liu Bei and go out of the ramp first.

This time, the troops are different, and it is different from the last time.

The last time the Northern Expedition sent troops to praise the slope, it was the army first, and the grain and grass behind.

Because if you want to open up the slope first, if the grain and grass are in front and the army is behind, it is purely to send food and grass supplies to people.

But this time, there was a garrison of 12,000 people at the Baochuan crossing, which could receive the hoarded grain and grass first, and then Liu Bei's army set off again.

Zhuge Liang and Zhang Xi were busy with this grain and grass transfer some time ago.

The current state of existence of the Han Dynasty is much better than in history, especially after laying Yongliang and mastering the Baochuan crossing.

Although it is still difficult to transport grain, whether it is Yongliang or Yizhou, most of them are mainly mountain roads, and it is very inconvenient to transport grain and grass.

But the current Han does not have the sense of urgency in history, although the speed and efficiency of grain and grass hoarding are not high, but as long as there is time, it can always be prepared.

In addition, the use of cement in Yueshan County is slowly being discovered and used, if it weren't for the Northern Expedition, Zhuge Liang really wanted to settle down and repair these mountain and forest roads in Yizhou first.

It's a pity that the most important thing in today's Han is still to recover the old mountains and rivers, and as for the development of infrastructure and the restoration of people's livelihood, it can only be put aside for the time being.

Therefore, based on such a difficult mountain road transportation, Zhang Xi still asked Zhuge Liang about the question of wooden cattle and horses.

I'm curious, I just want to see what the wooden ox and flowing horse made by Zhuge Liang are.

As for Zhuge Liang, in fact, he has been pondering this problem.

The road cannot be repaired for the time being, so increasing capacity seems to be the only way to do it now.

Capacity is a thing that is directly linked to livestock. Yongliang has not been completely pacified, and it cannot be counted on for the time being, and Yizhou is not a place to produce horses, Zhuge Liang took the trouble to transfer a batch of Yunnan horses from Nanzhong to barely make up for the lack of grain and grass transportation capacity of the Northern Expeditionary Army.

But after all, Nanzhong is too far away from Hanzhong, and the transportation efficiency in this year is low, and the Yunnan horses in Nanzhong are transported to Hanzhong, and a batch of them will die on the way, and a batch of them will die if they do not adapt to the climate of Hanzhong when they arrive in Hanzhong. Zhuge Liang was also distressed, and after being transferred once, he didn't dare to transfer it a second time.

Therefore, in fact, Zhuge Liang is also thinking about whether there is any other way to increase the transportation capacity.

Regarding the concept of wooden oxen and flowing horses, in fact, Zhuge Liang has also thought about it, but this thing is still a pure concept in Zhuge Liang's mind, and Zhang Xi didn't even mention it, and suddenly this concept had a name.

But it's not enough to have a name, what to do, Zhuge Liang still doesn't have a clue.

After all, there are still ten years before the birth of the wooden cow flowing horse in history, and if the folk legend is true, then this wooden cow flowing horse was not invented by Zhuge Liang, but by his daughter-in-law Huang Yueying.

When Zhuge Liang pulled Zhang Xi to discuss what kind of way to increase the transportation capacity, Zhang Xi knew that he probably couldn't see the so-called wooden cattle and horses.

The current situation is here, it will be the second Northern Expedition soon, Zhang Xi can afford to wait for Zhuge Liang to study the wooden ox and flowing horse, Liu Bei can't afford to wait.

Therefore, Zhang Xi had no choice but to get the two-wheeled board car and unicycle out.

But there is still a large part of Zhuge Liang's credit.

Zhang Xi was not a northerner in his previous life, and he only knew about these general means of transportation in the north, and he was not familiar with them.

The two-wheeled board car is a little better, with the big cars and vans of this era as a reference, Zhang Xi has no difficulty in getting it, it is to try to reduce the weight of the vehicle, increase the load capacity, and make the two-wheeled board car can be used by people and animals.

But the wheelbarrow is somewhat technical.

How to ensure the balance of the vehicle at the same time, but also to increase the load as much as possible, the position of the spindle wheel arrangement in order to reduce the burden of the user to the greatest extent.

After all, a wheelbarrow is a one-man means of transportation, and the strength of a person, after all, cannot be compared with livestock, and if you can't find a suitable torque, it will be twice the result with half the effort.

Zhang Xi may not understand these things, but it doesn't matter, Zhuge Liang understands, and he really understands.

Zhuge Liang is a person, really, people often only remember his political and military talents, and even have been arguing for thousands of years whether Zhuge Liang's military ability is strong or not, but few people can evaluate him comprehensively.

Zhuge Liang is not only excellent in governance and outstanding in military affairs, he is also an all-rounder.

Politics, Economy, Culture, Music, Science and Technology, Military. There is no Zhuge Liang who will not.

This kind of all-rounder, in China's more than 3,000 years of history, there is no second person who doesn't know Zhuge Liang every day, where does this confidence come from.

Anyway, Zhang Xi admired it very much.

He put forward a general idea, drew a sketch, Zhuge Liang got it with a bright eye, and then kept repairing and modifying, and a wheelbarrow was born.

What's even more ingenious is that Zhuge Liang also placed a small mechanism on the axle of the wheelbarrow, as long as you twist this mechanism, you can put a "lock" on the wheelbarrow, so that the wheelbarrow can't move forward at all, this thing should be the "tongue" in the description of the wooden ox and flowing horse, right? !

This small mechanism is actually just a small mortise and tenon structure, but it is very hidden, if it weren't for Zhuge Liang and Zhang Xi to explain where it was, even Zhang Xi couldn't find it.

And this wheelbarrow also made Zhuge Liang very satisfied.

Although the two-wheeled scooter can be pushed by a single person, it is still more suitable for flat roads, and in case of mountain roads or muddy roads, the two-wheeled scooter must be transported by animal power.

Although it is much better than the current van, it is not too suitable for the current combat environment after all.

However, the wheelbarrow is not only suitable for walking on mountain roads, but also can save animal power and transport more food if it can be used by a single person.

What's more, the weight carrying capacity of the unicycle is not low, as long as the balance is mastered, it is not so difficult to operate.

These two things can increase the efficiency of grain transportation of the Northern Expeditionary Army by fifty percent at once, and if it is necessary to mobilize the whole people to transport grain, then at least the army of the Han Dynasty will no longer be limited by the supply of grain and grass.

Under Zhuge Liang's peace of mind, he directly built 2,000 two-wheeled carts and 3,000 wheelbarrows to transport grain to the Baochuan crossing.

First, try how it works, and second. Zhang Xi took out this thing in too much time, and there was not enough time to build it in large quantities, and with the efficiency of the current craftsmen in the army, it was not easy to build 5,000 vehicles.

However, the actual use of unicycles and two-wheeled carts is very satisfactory to Zhuge Liang, especially unicycles.

Once the two-wheeled board car is damaged, it is still more troublesome to repair, and it is also large, and it occupies more space, in case it is broken on the plank road, it will affect the transportation of grain and grass behind.

But the wheelbarrow can be repaired by anyone who knows a little carpentry, and it does not take up space, and moving to the side can make way for other wheelbarrows to pass.

In less than ten days, Zhuge Liang had already transported nearly 20,000 people to the Baochuan crossing for a month's worth of grain and grass.

It is enough to have these grain and grass reserves in advance, and when the army arrives at the Baochuan crossing, with the current grain transportation efficiency, it will be too late to continue to transport grain in the future.

Therefore, Zhuge Liang wrote to Liu Bei to inform him of the logistics preparations, and Liu Bei saw that everything was ready, so don't waste time.

I've been in Hanzhong for a month, and if I don't set off again, God knows if the Eastern Wu on the Central Plains is still on the offensive. If you miss this opportunity, you will waste a good opportunity.

In the second year of Zhang Wu, on October 11, Liu Bei sacrificed to heaven and earth in Hanzhong, officially set off the Northern Expedition, and the soldiers were approaching the slope crossing!

(End of chapter)