There was a sudden silence in the room, and Yin Ji's voice rang out. "Who?"

"Me."

"The general is coming, the general is coming." Yin Ji said in a loud voice, interspersed with a few unfamiliar voices that were slightly flustered. "What to do, what to do?"

"Hide, hide."

"Where are you hiding?"

"Behind the bed, get in, get in."

The sound in the room was very small, but Sun Ce's ear power was very good. He should have turned around and left, but when he saw that Huang Yueying and Yin Jiao didn't want him to know, he wanted to see who it was. He pretended not to hear and continued to knock. After a while, the door creaked open a crack, revealing Yin Jiao's half-red face.

"General, why are you here?"

"Can't I come?" Sun Ce asked rhetorically, and then noticed that the room was as warm as spring, the heating was coming, and his face, which was frozen by the cold of the night, immediately regained consciousness. He frowned and rubbed his hands. "Why is it so warm in the house?"

"Uh...... Sister Achu made floor heating. ”

"Earth...... Warm? Sun Ce almost bit his tongue. So tall? When he saw the window, he was already surprised. In this era, there was no window paper, the windows were communicated inside and outside, but separated by patterned mullions, even if the rich people were willing to use silk silk, they had to be blocked with soft cloth in winter, because silk silk was not insulated. Huang Yueying did not use a soft cloth to block it, and continued to use silk silk, it turned out that there was floor heating, and she was not afraid of cold.

Sun Ce raised his eyebrows. "You blocked the door and didn't let me in, because you were afraid that I would see you waste, right? Now that the whole city has a wartime quota, how much firewood do you have to use for floor heating when you are hiding here? ”

"Who said I used firewood?" Huang Yueying squeezed over and opened the door, her little face raised high, and she couldn't hide her pride. "Come in and see, I've burned a piece of wood."

Sun Ce stepped into the room, and when he swept his eyes, he saw five pairs of stationery on the huge bookcase in the middle. He swept his eyes, and saw the bed curtain tremble slightly, and listened carefully to the slight sound of breathing. He pretended not to see it, and walked around the bookcase, but he did not find any stove, nor a single piece of firewood, but only a few rows of thick brass pipes in the corners, emitting heat.

"See firewood?" Huang Yueying shook her head and was proud.

"I didn't see the firewood, but I saw a good calligraphy." Sun Ce picked up a bamboo slip, looked at the handwriting on it, and praised it: "Is this the character of Auntie?" I haven't seen you for more than a month, and your calligraphy has grown a lot. ”

Yin Ji's eyes were smart. "Hee-hee, I can't write so well."

"That's Achu's? Not like that. Achu's words have an ancient style, not so beautiful. ”

Huang Yueying pursed her lips and rolled her eyes. "What kind of ancient style, saying that I don't write well is not good-looking, and it is weird. I know your calligraphy is good, and I don't like my handwriting, so let me tell you the truth, this calligraphy is someone else. Not only is the calligraphy good, but it looks even better, but it just won't let you see it. ”

Sun Ce laughed. "No wonder there are five pairs of pen and ink, it turns out that there are still people, so I won't bother. Auntie, are you going back to sleep today? If you go back, come with me and talk by the way. If I don't go back, I'll go alone. It's cold at night, you pay attention, don't freeze. ”

Yin Ji squeezed her eyes at Huang Yueying and said with a smile: "Ah Chu, you talk slowly, I'll go back first, and I'll come back tomorrow." With that, he picked up the clothes hanging on the side and followed Sun Ce out of the door. Huang Yueying raised her head and rolled her eyes, but she didn't look at Sun Ce. Sun Ce couldn't help but smile, walked to the door, and turned back and said, "Ah Chu, you too, don't freeze." ”

"Leave it to me." Huang Yueying glanced at Sun Ce and couldn't help laughing.

Sun Ce raised his hand and closed the door. Walking into the courtyard, Huang Yueying opened the window and asked, "Don't you want to know what I use for heating?" ”

Sun Ce stopped and thought for a moment. "Since it's not firewood, it's coal?" He knew that Nanyang produced coal and that it had been used for iron smelting in the Han Dynasty.

"Guess again."

"Then ......," Sun Ce looked up. Could it be sunshine? "If Huang Yueying knew about using solar energy at this time, it would be a bit against the sky.

"! There is no sunshine at night. Let me tell you, it's ground fat. ”

Ground fat? Sun Ce quickly searched in his mind. Huang Yueying should be talking about oil, but is there oil in Nanyang? It's really not clear. There is no information about oil in the Qin and Han historical materials he reads. If Nanyang has surface oil, it could be a huge help in the upcoming war.

Sun Ce's heart moved, and he walked quickly to the window and looked at Huang Yueying through the window. He was a head taller than Huang Yueying, and at that moment, he saw a slender figure and a stunningly beautiful face through the crack in the window—the most beautiful face he had seen so far. He was stunned for a moment, staring at the woman, the woman felt his gaze, looked up, and saw Sun Ce staring at her, taken aback, a pair of phoenix eyes widened. She raised her hand to cover her mouth and slipped behind the bed curtain, and disappeared in an instant, leaving only the bed curtain shaking slightly.

Sun Ce was stunned.

Huang Yueying raised her head, saw that he was distracted, looked back, but there was no one there, so she raised her hand and shook it in front of Sun Ce. "What are you looking at?"

Sun Ce came back to his senses, lying on the windowsill, facing Huang Yueying on all sides, blinking. "Did you mean that the grease came out of the ground, black, sticky, and smelly?"

Huang Yueying was surprised. "You've seen it?"

Sun Ce smiled and did not answer Huang Yueying's words. "Achu, do you know that there is another name for this kind of ground fat you are talking about."

"What's it called?"

"Liquid gold."

Huang Yueying gasped and covered her mouth with her hands. "You mean, what I use to keep warm is a treasure as valuable as gold?"

"It's not like that, it's a liquid gold mine at most." Sun Ce raised his hand, pinched the tip of Huang Yueying's nose and shook it gently. "Burn it, if burning some grease will keep you warm, it's worth reading a little more and coming up with a brilliant idea to extract this liquid gold out of the grease." He paused, and then said: "Achu, you see, this is the power of knowledge, a real scholar, even a woman has the potential to change an era and exert unimaginable power. ”

"Really?" Huang Yueying's eyes were shining, like stars in the night sky. It looks weak, but it is a real bright beginning.

"Really." Sun Ce waved his hand. "But don't be in a hurry, it's not too late to wait until you repel the Xiliang people before thinking about it. This is not something that can be done in a day or two, it may take a lifetime. ”

Huang Yueying clenched her small fists to cheer herself up. "I'm going to get this gold out of the earth's fat."

Sun Ce touched Huang Yueying's head and ruffled her hair. "Go to bed early, don't get cold, take care of yourself, you are my money."

Huang Yueying glanced at Sun Ce, suddenly closed the window, turned to lean against the wall, and smiled with a wild heartbeat, smiling very happily.