Zhang Zheng shrugged and turned around and left. Can Li Tai make a large Kong Ming lantern to fly? Yes, but you can only fly at noon, because sooner or later something will happen.

After Zhang Zheng walked away, the guards of the Wei Palace's palace put him in front of the large Kong Ming lantern, and Li Tai took out the small notebook in his arms and began to write and draw.

Since he dared to ask Zhang Zheng to see this thing, it means that he has already experimented with it, and this thing can indeed take people flying.

But Zhang Zheng only glanced at it and vetoed his three-day results. What does this mean, it shows that the thing he made has not yet met Zhang Zheng's requirements.

So Li Tai began to study again.

"Since paper is easy to make of paper, let's change the material. There is also the boxy shape of the Kong Ming lantern, and the resistance above is pressed straight on the top of the same roof. What if you change to a taper shape? Well, there is also the bamboo strip used to support the inside of the Kong Ming lantern, the weight is too heavy, can it be replaced with something else? After the large Kong Ming lantern was vetoed by Zhang Zheng, Li Tai did not start making the next Kong Ming lantern for a long time.

Instead, he reviewed all the knowledge he had learned with Zhang Zheng in the past four years. Eventually, silk cloth is used instead of paper, and there is no better substitute for bamboo strips, so use air-dried bamboo strips.

Another few days passed, and Li Tai's Kong Ming Lantern No. 2 test officially began. It's just that the experiment has just begun, and Li Tai's self-confidence has been completely damaged.

Because the gaps between each thread of silk were so large that the hot air quickly escaped through these gaps.

So, Li Tai's second test was declared a failure. The third time, a layer of glutinous rice paste was brushed on the outside, which caused the weight of the Kong Ming lantern body to be too heavy and failed.

Fourth, failure. The fifth, failed. Sixth, seventh, eighth...... Fail! After a dozen consecutive failures, Li Tai's confidence has collapsed somewhat.

Because he can't find the problem anymore. After the first incident of Kong Ming Lantern, Li Tai was convinced that Zhang Zheng's theory was correct.

Since the theory is correct, it is a matter of materials, so Li Tai began to search for suitable materials all over the world.

But now he was almost on the verge of turning over all the messy materials in the treasury and the inner treasury of the palace.

Dozens of materials have been changed, and the shape has been modified dozens of times, but the final effect is not as good as the first time.

So Li Tai's expression was so haggard that his eyes lost their brilliance. Li Tai didn't come to him for more than ten days in a row, and Zhang Zheng couldn't sit still.

Doesn't he have any questions to ask himself? Did he think that without his own guidance, he could make a hot air balloon with just a set of theories?

Zhang Zheng slowly paced to the wasteland, only to see that the wasteland had been arranged by the guards of the Wei Palace, like a military camp.

And Li Tai was doing something on a table set up outside a big tent, and the manuscript paper was already piled up as high as a hill.

And not far behind Li Tai, a large balloon standing tall and erect had already inflated before it was ignited.

Zhang Zheng came to the edge of the hot air balloon and circled the hot air balloon twice. found that this hot air balloon is actually not much different from the appearance in Zhang Zheng's memory from the perspective of shape.

It's just that the hot air balloon in Zhang Zheng's memory collapsed on the ground before the fire was lit.

And the hot air balloon designed by Li Tai is already what it looks like after ignition. Zhang Zheng raised his hand and touched the material, on which there was a layer of sticky fish glue to plug the gaps in the silk thread.

After reading it carefully, Zhang Zheng came to a conclusion: that is, Li Tai is now very close to success.

"Teacher, why are you here?" Just as Zhang Zheng was looking at the behemoth in front of him with his hands behind his back, Li Tai also spotted Zhang Zheng who appeared next to the hot air balloon.

After more than ten days of recuperation, Li Tai, who has rough skin and thick flesh, has become able to run and jump again.

"Let's see your progress, how's it going, can you fly now?" However, as soon as Zhang Zheng spoke, Li Tai's eyes suddenly turned red, as if Zhang Zheng poked his sadness, and the whole person became resentful.

"Teacher, this, the disciple has improved it dozens of times, but no matter how hard the disciple tries, it just can't fly. The disciple's hair has fallen out in handfuls. Li Tai said, the corners of his mouth were deflated, and tears appeared in his eyes.

Li Tai's contrived appearance saw that Zhang Zheng was full of black lines, but he came to see Li Tai today just to guide him.

So Zhang Zheng pointed to Li Tai's big balloon and said: "You can think of using fish glue to block the gaps in the silk thread, why can't you think of replacing it with cow batches or sheepskins?" Also, these skeletons made of dense bamboo strips inside, with such a heavy mass, there will be ghosts if they can fly, and the balloons above will also bulge due to air expansion after lighting the fire, don't you want these skeletons to do this extra thing? The manned platform below is so big, even if people can fly into the sky, they will have already been baked, and if you add a basket made of bamboo strips, the mass will not be greater than the skeleton above. The link between the manned platform and the balloon above, will the mass of the rope be greater than that of the wooden strip you use......" Li Tai followed behind Zhang Zheng and listened to him.

Every time Zhang Zheng pointed out a problem, Li Tai's face became ugly. It wasn't until Zhang Zheng said that his latest version of Kong Ming Lantern was worthless, and a few tears of grievance finally fell from the corners of Zhang Zheng's eyes.

Zhang Zheng smiled secretly in his heart: "Sample, let you usually look like everyone is a fool, if you don't take the opportunity to hit you, you won't be able to go to the sky." ”

"Yes, teacher, the disciple understands, in the past, the disciple sat in the well and watched the sky, and the next time the disciple will ensure success." Li Tai's posture is very low, and Li Tai has always been very respectful of the authority of experts.

"Hmm." Zhang Zheng tilted his head, snorted softly in his nose, and then turned around and walked away with his hands behind his back.

As soon as Zhang Zheng left, Li Tai commanded the craftsmen and palace guards present to operate.

"Didn't you hear what the teacher said, why don't you hurry up and find a skin for this king, and who else is, immediately go to find the rope. You, you, yes, you, go and call the craftsman who weaves the bamboo basket. Hurry up, if you delay the king's affairs, you won't be killed......" Li Tai held his head high, his attitude was quite bad, and his subordinates rushed around with his command, a chaotic and harmonious scene.

With Zhang Zheng's guidance, Li Tai's grasp of successfully making a hot air balloon suddenly became 100%.

Because all the problems pointed out by Zhang Zheng were not thought of by him. He vowed that this time he would make a hot air balloon from his teacher's mouth.

Because, he wants to be a smart person, not a fool.