As soon as Zhang Nan's words came out, Cui Shao hurriedly gave Zhang Nan a look, what Zhang Nan said was simply a big rebellion, who is Comrade Li Er? That's the Son of Heaven of the Tang Dynasty, the Heavenly Khan of the surrounding countries, Zhang Nan is now fighting with the sky one by one, isn't this fighting Li Er?

Sure enough, Li Er also frowned after listening to Zhang Nan's words, although Comrade Li Er valued Zhang Nan very much, but this did not mean that Zhang Nan could speak casually, especially in front of so many people.

The princes present showed their adoring eyes one by one.

Li Chengqian: "Master Zhang, you are so fierce that you can even say this kind of thing in front of your father." ”

Li Tai: "Why did Master Zhang start talking nonsense?" But I'd better think about how to ask Master Zhang to give me the next chance to go to sea with the ship. ”

Li Ke: "Master Zhang, you are simply the guiding light in my life, and you dare to talk to my father like this." ”

Li Su: "I must learn from Master Zhang, and one day I will talk to my father like Master Zhang." ”

Unexpectedly, Zhang Nan waved his hand at Cui Shao, who was nervous, and then said calmly: "Your Majesty, don't you think that this is against Tiandou, in fact, people have been fighting with Tiandou since ancient times?" Isn't it? ”

"What do you mean by that?" Li Er frowned.

"Your Majesty, during the period of the Three Emperors and Five Emperors, the Yellow River flooded, and the father and son of Kun and Yu were ordered by the two emperors of Yao and Shun, and appointed Chongbo and Xia Bo to be responsible for water control. Isn't this the best example of Man and Heaven Dou? Therefore, this person and the sky are fighting with each other, which is the mission given to people by the old talent. Zhang Nan arched his hand and said.

Hearing Zhang Nan say this, Li Ercai showed a smile, and then nodded at Zhang Nan in the air, and then said: "Qingquan, you guy is getting more and more shameless, and he has lifted himself to the height of Yu all of a sudden." ”

Of course, Li Er said this not to praise Zhang Nan, but to elevate himself.

Dayu was ordered by the second emperor of Yao Shun to control the water, and now Zhang Nan has raised himself to the height of Dayu, so isn't he the second emperor of Yao Shun? How can you not make Comrade Li Er happy when you say this?

"Hehe, the minister doesn't dare, but the minister really has a way to make crops grow in winter." Zhang Nan said with a smile.

"Oh? Coming into detail, I'm curious to know what you can do to make crops grow in this winter when everything is withering. Li Erdao.

Hearing Comrade Li Er's question, Zhang Nan naturally talked about it, after all, Zhang Nan still likes to do it very much to popularize biological knowledge.

"I don't know if the emperor has found a small phenomenon, that is, crops that can get the sun will appear greener, but if they can't get the sun, the leaves will turn yellow." Zhang Nan said.

After hearing this, Li Er quickly nodded.

In fact, Li Er didn't have the heart to care about this kind of thing at all, but now that the ministers are sitting here, Li Er naturally doesn't understand it and pretends to understand.

"This can actually be inferred that plants rely on sunlight to grow." Zhang Nan said.

"The old man understands what you mean, but there is sunshine this winter, why don't crops grow in winter?" Sun Simiao asked with a puzzled face, as a person who often goes up the mountain to collect medicine in person, Sun Simiao naturally knows this truth.

"Don't worry, since we can infer that plant growth is inseparable from sunlight, then we can also infer something else, now you know that every plant needs sunlight to grow, let's admit this." After Zhang Nan finished speaking, he looked around.

The people around him all nodded, looking at the eyes of the people around him who were eager for knowledge, Zhang Nan couldn't help but feel that his IQ had occupied the high ground again.

"But why doesn't the moon season bloom in winter? Plum blossoms bloom in winter? Why is it that sycamores are bare branches in winter, while pines and cypresses are still evergreen in winter? Zhang Nan asked.

"Huh? That's right, if you hadn't brought it up today, I really wouldn't have noticed it on weekdays. Cheng bites Jin Dao.

Zhang Nan rolled his eyes at Cheng Yanjin in his heart, and said in his heart: "It's strange that you can find out." ”

"So can we infer from this phenomenon that each plant has different requirements for the degree of heat and cold? Of course, there is a more scientific explanation for this, and the name is cold resistance. Zhang Nan said.

"Cold resistance? The implication is that those crops that don't grow in the winter are just because the weather is too cold, although there is sunshine, but because the weather is cold, they don't grow? If you can give these crops a warm climate, will they grow again? Kiyozumi: That's what you mean. After thinking about it for a while, Li Er gave his own conclusion.

Although Comrade Li Er is the first time to come into contact with these emerging knowledge, Comrade Li Er's logical thinking ability is still very good, so Comrade Li Er also quickly came to his own conclusions.

"What the emperor said is too right." Zhang Nan arched his hand.

"You go on." Li Er waved his hand, signaling that Zhang Nan could continue to talk without patting his ass.

"So knowing these two points, we have the essentials of growing plants in winter, as long as we create a warm environment and give plants plenty of sunlight, it is not difficult to grow plants in winter." Zhang Nan said.

"Hey, what's so hard about that? Wouldn't it be nice to build a greenhouse for these things? Cheng Yanjin said with a wave of his hand.

"No, have you forgotten? These things still need sunlight, and if there is no light, the crops will come out withered and yellow. Fang Xuanling said.

"So at this time, we need a transparent house, which can not only keep heat but also transmit light, and I think this thing is good to make a house." Zhang Nan said, and picked up the goblet in front of him.

Seeing Zhang Nan pick up the goblet, Li Er also drank the red wine in his goblet in one gulp, and then said: "This thing is really good, but with such a translucent water jade to make a house, I'm afraid I can't build one even with all the strength of the entire Tang Dynasty." ”

"Your Majesty, do you think this thing is worth it?" Zhang Nan asked with a smile.

"Naturally." Li Er frowned, as if Zhang Nan had asked a very idiotic question.

"But what if this thing is so valuable? Why is there so much jade in this house? And Your Majesty, are you taking a closer look at what this restaurant is made of? Zhang Nan said with a smile.

As soon as Zhang Nan said this, everyone suddenly reacted, and now they were sitting in a room made of water jade in their mouths.

This is the legendary "black under the lamp".