"Wait." Liu Bian turned around and returned to the cave, picked up the Chixiao Sword, and walked out again. "Xun Yu, have you seen the change in the color of the Chixiao Sword after the true energy was injected into the Chixiao Sword?"

Xun Yu nodded, with a little more hope in his eyes. Obviously, Liu Bian was going to say something to him, and these things were very important to him, and it was probably something he had never thought of. He had seen the scene when Xi Zhicai held the Chixiao Sword in his hand. These scenes were deeply engraved in his mind, and perhaps they would never be forgotten in his life.

Liu Bian didn't say much and injected the true energy into the Chixiao Sword. The Chixiao Sword changed from red to orange, then turned yellow, green, blue, and finally turned purple, and slowly became transparent, as if it had disappeared out of thin air, leaving only a sword hilt in Liu Bian's hand.

"What did you think of?"

Xun Yu frowned and thought hard.

Liu Bian slowly withdrew his true energy, and the disappeared Chixiao Sword slowly appeared, turning from purple to red.

Xun Yu stared at the Chixiao Sword without moving, his eyes focused and his expression was solemn.

Liu Bian repeatedly demonstrated it twice, then put the Chixiao Sword aside and went to arrange breakfast. Xun Yu picked up the Chixiao Sword, paced back and forth, while muttering something in his mouth, and didn't know what he was saying. Until Diao Chan and Kawujie walked out of the cave side by side, and saw Liu Bian cooking, while Xun Yu was dazed by the side, he couldn't help but be surprised.

Liu Bian waved his hand and told them not to disturb Xun Yu. Kawujie pouted and said, "Why is he going crazy?"

Liu Bian smiled. "It's nothing, I'll give him a difficult problem. He is solving the problem."

"How do you use a washbasin to make breakfast?" Diao Chan saw the copper pot beside her and suddenly realized. Kawujie also saw it and couldn't help but scream. "Why is he so stupid and can't do anything."

Liu Bian couldn't help laughing. It was rare for people to be called stupid by Xun Yu. Fortunately, Xun Yu was addicted to thinking and did not hear it, so he could not help but feel embarrassed. Liu Bian didn't care about him, and first burned a basin of water to wash, then washed the basin, and started making breakfast.

Life on the grassland is very leisurely. It’s noon to get up at midnight. I ate breakfast and lunch together. Kawujie comes from a nomadic people. It’s normal for two meals a day, and sometimes I even only eat one meal. The Han people are used to two meals, and the rich families have three meals. The emperor is special. Four meals a day. But now Liu Bian doesn’t look like an emperor. He ate a basin with Diao Chan and Kawujie. He ate a meal that was considered breakfast and lunch.

After they finished eating, Xun Yu walked over unconsciously, picked up a piece of meat, and was about to send it to his mouth when he was stunned.

He stared at the oil flowers in the pot and smiled on his face.

The semi-cold oil film shines with colorful halos under the sunlight.

"Rainbow is a rainbow." Xun Yu suddenly jumped up, so excited that he didn't know where the meat in his hand was thrown away. "Your Majesty, it's a rainbow!"

"You are the rainbow, your whole family is the rainbow." Liu Bian snatched the chopsticks from his hand and shouted angrily: "Touch me with the chopsticks again, don't blame me for smoking you. As for it, it's just a small question. After remembering for so long, you are really not in the world. Haven't even seen the rainbow?"

Xun Yu smiled embarrassedly and rubbed his hands and said, "Your Majesty, when I was young, I studied behind closed doors and rarely went out, and I had no experience of going out to enjoy the rainbow on rainy days. The seven colors of the rainbow were still in seclusion on Songgao Mountain. I saw it occasionally, and I didn't care at that time, so I didn't remember it."

"This is due to your Confucian habits. To a certain extent, you are an unfilial descendant."

Xun Yu said in surprise: "Where does this start? Confucianism has passed on loyalty and filial piety. Although my ministers are stupid, they dare not be unfilial."

Liu Bian rolled his eyes: "You tell me about your Xun family's knowledge every day. I remember your ancestor Xun Qing said: A gentleman is not a different nature, but a good person is good at things. Without a boat, people cannot travel around the world. Without a carriage, horse, people cannot travel thousands of miles. When doing research, you not only read books from ancient people, but also observe all things around you. Is this the truth?"

"Uh...is basically right."

"You said Dong Zhongshu was working on cars behind closed doors, but you were not even familiar with Rainbows. How good are you than him? With your academic attitude, can you build cars and boats?"

"Making cars and ships is the business of craftsmen..."

"Yes, the specific production should be the responsibility of the craftsman, but you should know how to build it, right?"

"This..." Xun Yu hesitated: "Did Your Majesty talk about the Mo family?"

"Not the Mo family." Liu Bian had a headache. Why did such a smart person feel dizzy when he talked about these things? It's not that he didn't understand, but that he was instinctively repelled. The bad nature of scholars is indeed that they are lazy and want to make money. They are determined to rely on a few articles to drag their green and purple to get out of the generals and faces. "How do you come from learning? It's not something that comes from empty thoughts, but from everything around you. Fuxi made a hexagram to look at the world outside and observe the body inside. He didn't think of it by himself with a slap in his head."

"Oh..." Xun Yu suddenly realized: "Then what does this have to do with the Rainbow and Chixiao Sword?"

"The rainbow has seven colors, and Chixiao also has seven colors. And as the true energy injected into Chixiao is different, the color changes are the same as the color changes of the rainbow. How could they be similar?

Xun Yu blinked his eyes and had a tendency to petrify again. Liu Bian was speechless. He didn't expect that such a simple explanation would become so complicated. He scratched his head: "Have you ever seen a sword casting?"

Xun Yu shook his head: "My Xun family has iron works, but I haven't looked at it carefully."

"Do you know what color the fire can only be used to cast swords?"

"This...is said to have to wait for it to turn blue."

"The fire is usually red, why wait for it to turn cyan?"

Xun Yu blinked his eyes and became dumbfounded again.

Liu Bian sighed: "Of course, it is because the temperature has become higher. The temperature of the red fire is the lowest, which is not enough to melt the iron. The temperature of the green fire is higher, so you have to wait until the color of the fire turns blue before you can use it to cast a sword. You don't understand such a simple truth, and you are embarrassed to call yourself the leader of the Confucian school?"

Xun Yu looked at Liu Bian awkwardly, not knowing how to refute it for a moment. He did not pay attention to these issues, because he was concerned about national affairs and would not pay attention to these minor issues at all. But now when he heard Liu Bian talk about it, he realized that this issue did not seem simple. The color of the fire, the color of the rainbow, and the color changes of the Chixiao Sword are integrated and consistent.

Liu Bian used the Chixiao Sword to draw a line on the ground, cut a small section from it, and divided the section into seven small sections.
Chapter completed!