Master Duvalin touched his chin and pondered for a moment, then asked a straight question: "Do you want to scrap the carriage as a means of transportation, or just modify the parts of the carriage, such as the wheel?" ”

"At present, the construction of railways in the Far East has just begun, and it is far from the stage of eliminating horse-drawn carriages, and I want to transform the wheels." "The initial idea is to wrap the traditional iron wheels with a flexible, elastic and friction-resistant substance, and use their elasticity to absorb the impact from the ground, acting as a buffer between the carriage and the ground, reducing the shock of the carriage, which can not only reduce the wear and tear of the carriage wheel axle, greatly extend the service life, but also reduce the bumps and noise generated by the carriage at high speeds, so that passengers can get a more comfortable travel experience." ”

"If your vision can be realized, it will indeed have a huge impact on the carriage industry." "The speed of the carriage is often less than a quarter of that of the galloping horse, not that the carriage cannot run faster, but mainly because the poor road surface limits the speed, if the speed is too fast, the passengers will be dizzy and vomit, and the carriage itself is also easily damaged, if the wheels are improved and wrapped with a layer of elastic material, the speed of the carriage can be increased, which is of great benefit to improving the efficiency of road transportation." ”

"You're so right, Mr. Duvalin, the problem is that I haven't found the right material to make a tire, can you help me figure it out?" Roland struck while the iron was hot, described the various properties of rubber in detail to the dwarf alchemist, and waited for his reply with great anticipation.

As the minutes ticked by, Old Man Duvalin was still pacing back and forth in contemplation.

The hope in Roland's heart also faded as time passed. He had asked the same question to many learned elders, including Sukhoi, Matvey, and Andrey, but unfortunately they had not received satisfactory results, could Duvalin give an answer to this dilemma?

"I have a substance in mind that should meet your requirements." After a long wait, the dwarf alchemy master finally spoke slowly.

"What substance?" Roland was overjoyed and asked.

Duvalin turned around with his hands behind his back and looked at him deeply, his face extremely heavy: "Although this substance is good, it is a pity that it is too difficult to obtain, and I don't think it is suitable for renovating wheels." ”

Roland seemed to have been poured cold water on his head, and he barely maintained a smile in disappointment: "You might as well talk about it, maybe there is a way to get some." ”

"The main material realm does not produce this material," Duvalin dispelled his illusion with a single sentence, "only the astral realm has it, and it can only be extracted from the Endless Void by psychic powers. ”

Roland had a flash of inspiration and suddenly looked up at Duvalin: "What are you talking about...... Star quality? ”

The dwarf alchemy master nodded, his face full of apologies: "To meet those requests you made, the only material I can think of is astral quality, I'm sorry, Your Highness the Prince, I couldn't help you." ”

"No, no, master, you don't have to apologize!" The corners of Roland's lips furrowed, "Actually, I want to thank you for helping me a lot. ”

"What, Your Highness has a way to get a large amount of astral quality?" Duvalin asked, staring at Roland suspiciously.

"Well...... I'm not sure yet, but I can give it a try. Roland's smile was a little more mysterious.

Master Duvalin was not able to help Roland solve the problem of making tires completely, but the hints he gave were crucial, as Roland seemed to see a light in the endless darkness and knew who to ask for this problem next.

Roland said goodbye to Master Duvalin, and when he left the cement factory, it was almost dusk, and he politely refused Semyon Ivanovich's banquet, and called the "Navigation Messenger" Sputnia to come out and teleport directly to his own territory in the astral plane, the free trade city "Silver Sky".

Returning to the astral boundary after half a year, Roland found that the streets of the silver sky were much more lively than before, and the large teleportation array in the center of the city was particularly busy, with travelers lining up in two long lines, and the people who were in their turn walked into the teleportation array quickly, chanting the activation spell loudly, and then they were shrouded by a pillar of light rising from the ground, and disappeared after three seconds, and was replaced by another one to teleport.

Roland observed the street corner for a moment, and confirmed that the silver sky was indeed much more prosperous than half a year ago, and judging from the flow of people on the street, the local residents may have exceeded the 5,000 mark, and in the astral boundary, this is considered a big city.

What surprised and amused him even more was that the dimensional teleportation array set up by Eltaran had undergone obvious changes. First of all, the activation spell has been changed from the original simple phrase "Praise the Eye of All Worlds" to "Praise His Majesty the Great King Rudolf I, Praise the wise Prince Roland, and praise the wise Lady Eltaran...... This is a long list of sycophancy. The second change is that the teleportation is orderly, people are consciously queuing, and if someone is in a hurry, there is a special lane with a red sign next to it, which is reserved for those who cut the queue - of course, there is a fee for cutting the queue, and it doesn't seem to be cheap.

The cumbersome incantations full of flattery, the strict order, and the "VIP access" system where "if you have money, you can do whatever you want", these three things are not surprising in isolation, and when combined, they show a strong devilish style. Roland circled around the teleportation array, and sure enough, he saw a blessed angel with a sword and a whip maintaining order, no wonder pedestrians had to line up obediently.

Roland walked up to the blessed angel in black leather armor and recognized the plump and bewitching witch police officer named Olga, Daria's right-hand man, and there seemed to be a little ambiguous "lily" relationship between the two.

"Huh?! Your Royal Highness! Olga overheard of Roland, was stunned for a moment, then smiled in surprise, knelt down on one knee, and bowed to the ground with both hands: "My master, welcome back to the silver sky that is loyal to you!" ”

The witch's flattery and humble kneeling can indeed bring great psychological satisfaction, but if accustomed to it, any normal man will probably become more and more arrogant and arrogant, and pretend to be a king on high enough. Roland secretly warned himself not to be too depraved, and raised his hand to signal the other party to get up and speak.

The female devil always adheres to the rules of unconditional obedience to her superiors, at least in person, not to mention that Roland is her top boss.

Olga stood up obediently and looked at Roland expectantly: "My beloved master, please grant the supreme honor of serving you by the slave and maid!" ”

Do you have to talk like that? Roland secretly screamed that he couldn't bear it, he really couldn't stand this "drama spirit". In contrast, he admires Daria, who is neither humble nor arrogant in front of him.