In the following days, Li Chengqian seemed to be forgotten, no one came to supervise his studies, and no one came to announce that he would meet him, and the entire Tang Dynasty was busy, so busy that he almost forgot that there was a prince.

After the eldest grandson Chong and Fang Yiai were beaten by their respective fathers, they limped to Li Chengqian's courtyard once, and after giving him a full fist in a place where no one was, the three of them had a casual meal and decided not to get together before Shangyuan.

It's just that during the meal, Li Chengqian heard the two of them talk about the recent situation in Chang'an, and knew that Chang'an was expensive outside, and there was a 'clang' sound of building iron stoves and iron chimneys everywhere.

In the past, only blacksmiths would use a small amount of charcoal, and the demand has increased a lot, and the convoy that originally sent charcoal to Changsun's iron workshop every day is now gone, and only cares about sending it to Chang'an City.

However, it is gratifying that the scrapped iron materials in the iron mill of the eldest grandson's family have a place to use, and after returning to the furnace, they are made into iron furnaces, and they are sold all over the city. Steward Zhou is also happy these days, and he can't keep his mouth shut these days, just talk about it if he has nothing to do, His Royal Highness the Crown Prince has great talents, but this kind of thing that the Manchu Dynasty and the civil and military all know, do you still use him to talk about it?

Of course, there are also some accidents in the use of charcoal stoves and charcoal, such as the eldest grandson's family and the Fang family, who were the first to use the kang, burned the kang a little hot, so after a few days, the mouth was full of fire bubbles.

For example, every time it is late in the sky, you will see curling smoke rising from the new chimneys of houses in Chang'an. If it was a southerly day, Li Chengqian could smell the smell of burnt even in the palace, so he kept muttering PM2.5, which made Chunxiao, who couldn't understand it, always think that he was having hysteria and almost called the imperial doctor.

The guards around Li Chengqian have all changed, and the previous batch has been borrowed because of the experience of installing charcoal furnaces, and all of them are borrowing from Li Er inside and outside the palace, and finally even the 'bald king' has been borrowed.

Although it looks like Chinese New Year's Eve is coming soon, the weather will soon get warmer, but it's a good thing to have a warm Chinese New Year's Eve, isn't it?

A pair of wide bamboo boards, riveted on the surface, made of simple skis. After standing on it, he tied his feet and clamps together with a rope, and then slid down from a ten-meter-high pile of charcoal, taking advantage of the snow that had fallen a few days ago, and the ghost cried wolf, which became a tireless entertainment activity for Li Chengqian in the past few days.

"Your Highness, two Highnesses, let's go back, it's late." Chunxiao skated twice, and after the pain of the fall, he didn't play anymore, but just accompanied him on the side.

"One time, one more time. I finally mastered the rules and didn't fall, so I had to do it again. "Li Chengqian's family situation in the later life is not good, there is no condition for him to go to the ski resort often, and now he has the opportunity to play casually, of course, he has to have a good time.

"Brother, brother, wait for me!" Princess Li Lizhi of Changle had just slid down from it on a sleigh converted from a Xiaoice car, and then ran after Li Chengqian.

Without Li Chengqian by her side, she wouldn't dare to play here alone.

Turning around to look at Li Lizhen who was chasing, Li Chengqian stopped, handed the snowboard in his hand to the guard, and only waited for Li Lizhen to arrive, so he carried her on his back, and then the two brothers and sisters went to climb the coal pile.

"Like when we were kids?" At a corner in the distance of the coal pile, Empress Changsun said to Li Er beside her.

His Majesty Li Er gently hugged the shoulders of the eldest grandson, and seemed to be immersed in the memories, and said in a low voice: "Like, I laugh and laugh every day, and I don't have any worries at all." ”

"I wish they could keep going like this." I don't know what to think of, the eldest grandson's mood is a little low.

"Don't worry, they can, I believe in my son. If Cheng Qian can't do this, then he is not a qualified prince. "No one can really figure out the emperor's thoughts, just recalled, and in a blink of an eye, he can move the mind of the wasted reserve.

"Okay, second brother, it's still a little early to say this, the children have gone back, let's go back too." The eldest grandson didn't dare to let this topic continue, so he quickly found a reason to divert it.

Li Er and the eldest grandson disappeared into the shadows and returned to the Lizheng Palace. Li Chengqian dragged Li Liqian, who was sitting on the sleigh, and walked unhurriedly.

"Brother, I still want to come and play tomorrow." Li Li's little face was red from the cold, but she couldn't hide a trace of excitement after the joke.

"Not tomorrow, your health is not good, and if you don't make it possible to toss so much every day, you will get sick." Li Chengqian really likes this sister, otherwise he wouldn't have taken her out to play alone.

"But, but Lizhi really wants to play." Knowing that she wouldn't come out to play again tomorrow, Li Lizhi felt a little aggrieved, and looked at her brother pitifully with big eyes.

"Eldest sister should be well-behaved, then study in the palace, wait for Shangyuan, the weather is warm, and my brother will take you out to play." After a series of gambling curses and vows, Li Chengqian could be regarded as making Li Li happier.

When he returned to the Xichi Courtyard of the 'Lanruo Temple', Chunxiao ordered someone to call for dinner, and waited for Li Chengqian to finish eating, and the drums of the second watch had already sounded for almost a quarter of an hour.

In the warm room, Li Chengqian was lying on the table boredly, staring at a pair of eyes in a daze. Chunxiao's voice sounded beside him: "What is Your Highness thinking?" ”

"Are you hungry?" An answer that was completely unexpected by Chunxiao popped out of Li Chengqian's mouth.

"Hungry? Didn't Your Highness just eat it? Chunxiao looked at Li Chengqian, who was sitting in a daze, and asked puzzled.

"What was that you just ate? Do you eat pigs? Steaming, boiling, and roasting every day, have you eaten enough? Thinking about his life for more than three months, Li Chengqian was full of sad tears.

In fact, if you really talk about the things he ate during this time, he didn't say anything, it was all the delicacies of the mountains and seas that he had not eaten in his later life. According to the national animal protection law in later generations, he could be shot more than a dozen times back and forth.

But the problem is that Datang has no monosodium glutamate, and the method of cooking food is monotonous, and good things can't taste good, if it weren't for living, Li Chengqian would rather choose to go on a hunger strike.

"Your Highness, what are you going to eat if you don't eat these?"

"What to eat?" The question is back to the original point, Li Chengqian has been pondering this question for a long time, but he has never found an answer.

Datang has vegetable oil, Li Chengqian has seen it, but those oils are like modern olive oil, they are not suitable for stir-frying.

Animal oil is also available in Datang, such as mutton fat, but thinking about the mutton smell, Li Chengqian thinks that it is not good to use it for stir-frying.

The lard was good, but not a single hair of such a creature was to be seen in the palace, let alone oil.

After thinking about it, Li Chengqian thought that the best way was to make soybean oil.

In his previous life, he was born in the countryside, and the oil mill in the village was a place where children often played, and those clumsy oil-making tools are still vaguely remembered. In order not to continue to endure the monotonous cooking methods of the Tang Dynasty, in order not to starve to death, Li Chengqian decided to be self-reliant.