Empress Eldest Sun seemed to see that something was wrong with Li Er, and asked intimately on the side: "Erlang, what's wrong with you, is there anything uncomfortable?" ”

Facing the concern of Empress Eldest Sun, Li Er smiled bitterly and said, "Didn't Guanyin see that the things that this guy Qingquan took out were a little familiar?" ”

After Li Er's reminder, Empress Changsun looked carefully again, carefully observing the hot air balloon, and after a long time, Empress Changsun shook her head and said: "This concubine does look familiar, but I can't remember what it looks like for a long time." Pen %Fun %Pavilion www.biquge.info"

Li Er smiled bitterly and said, "Didn't Guanyin find out that this thing that Qingquan took out was not a much bigger Kong Ming lantern?" ”

When Empress Changsun saw it, it was really like this. said with a smile: "Then the emperor must think that Qingquan took a much larger Kong Ming lantern and took away the emperor's thousand taels of silver." ”

"Eh, those who know me, Guanyin is also." Li Er looked at this large Kong Ming lantern with a melancholy expression, as if he was watching his thousand taels of silver drift away with the wind.

"The emperor doesn't have to think so, although this thing looks like a much larger Kong Ming lantern, but there are still many differences." Empress Changsun comforted Li Erdao.

"Oh, then Guanyin is going to tell me what's different about this thing." Li Er asked.

"Does this still use concubines? Listen, Your Majesty, when this thing ignited the thing above the clear spring, it made a particularly loud noise, and the concubines had never seen it, what thing could make such a loud sound when it burned. ”

When Li Er heard Empress Changsun say this, he listened attentively, and indeed heard a particularly loud sound from the hot air balloon flying in the air, but why didn't he hear it just now. Maybe I was too fascinated by thinking about a thousand taels of silver just now.

"And the emperor, you carefully observe the one that is on fire on the Qingquan, the emperor, you must not have seen it, especially when the Qingquan has not yet flown up, the concubine saw that there is a big jar in this basket, and the concubine estimates that there is something burning in the jar, so that such a big flame can be emitted, and this flame gathers but does not disperse, haven't you noticed it the emperor?" I have to say that Empress Changsun's observation is much better than Li Er's, but it is also possible that Li Er has a problem of pretending to be a thousand taels of silver in his heart.

"Guanyin is really meticulous in her observations, and I haven't found any of this." Li Er praised.

"Your Majesty has praised it, in fact, this is just the speculation of the concubines, it is better for the emperor to let Qingquan come down and ask him carefully."

"Well, that makes sense." After Li Er finished speaking, he motioned to Liu Bing to call down Zhang Nan who was in the sky.

At this time, Zhang Nan's legs floating in the sky were so weak that he couldn't stand up, so he could only sit in the basket and use his hands to reach the ignition device to operate, Zhang Nan didn't know how to operate the hot air balloon, so he would only go straight up and down, and Zhang Nan didn't fly high, so as not to let the hot air balloon float away.

"Lord Zhang, come down quickly, the emperor will let you come down." Hearing Liu Bing's call below, Zhang Nan seemed to feel that he had heard the sound of immortals, he had never felt that Liu Bing's half-male and non-female voice was so beautiful.

Zhang Nan hurriedly turned off the fire, so that the hot air balloon fell steadily in the imperial garden, as soon as he stepped out of the basket, Zhang Nan's legs were about to fall down, but fortunately, Liu Bing, who was standing aside, was quick and helped Zhang Nan.

When Li Er saw Zhang Nan's appearance, he couldn't help laughing and said, "What's the matter, our traverser is not afraid of high places." Hearing Li Er's inexplicable ridicule, although Zhang Nan's legs had been frightened, he still said stiffly: "The emperor's words are wrong, this fear of heights has nothing to do with me crossing the family, right?" ”

Li Er heard Zhang Nan shaking his legs and stiffening his mouth, so he didn't pursue Zhang Nan for talking like this, after all, this was for himself to go to the sky.

"Qingquan, I see that this thing of yours is just a bigger Kong Ming lantern? How dare you take a thousand taels of silver? Li Er pretended to be angry.

"Your Majesty, what you said doesn't make sense, you really wronged me, come on, look at it, this material, this device, you must have never seen it." When Zhang Nan heard Li Er say this, he was immediately unwilling, although he made a little money, he definitely gave Li Er a friendship price, but Li Er still said this, Zhang Nan was unwilling.

Li Er stepped forward and touched the material of the hot air balloon with his hand. He realized that he had never seen this thing, so he asked, "Qingquan, what kind of material is this, it is so strong, and it can't be burned with fire, it's really amazing." Li Er's two hands touched the airbag, as if Elder Jinchi in "Journey to the West" had seen the baby robe.

"This, this is called thickened high-temperature resistant canvas, but this thing can't be made by Datang, so don't think about it." When Li Er heard Zhang Nan say this, he was immediately unhappy, and he stopped looking at this thing, for the things that he couldn't make in the Tang Dynasty, Li Er couldn't raise any interest in it, and if he couldn't make it, it was equivalent to nothing, and without Li Er, he would not be interested.

"What about this? This looks so strange, what kind of metal is this, is it meteoric iron? Li Er pointed to the ignition device on the basket with his hand, and then pointed to the gas tank inside the basket and asked.

"This is still made of alloy, and Datang can't make this thing." Zhang Nan said that he was a little embarrassed here, and always said that if Datang couldn't make it, Li Er wouldn't be able to hang his face.

Sure enough, as Zhang Nan expected, Li Er snorted, walked to the basket, picked up the liquefied gas tank and shook it, and found that it was liquid, so he asked, "Qingquan, what's in here?" Is it fire oil? How I feel like water. Li Er put all the liquefied gas canisters next to his face and said while listening.

"There's gas in this." Zhang Nan thought about it and said, although he didn't understand it very well, he still understood liquefied gas.

"Gas? What gas? Empress Eldest Sun on the side asked strangely.

"It's one of the air we breathe every day." Zhang Nan said with an old god, after all, the happiness brought by knowledge is still very refreshing.

"How does it become like water?" Li Er looks like a good student.

Where does Zhang Nan know why, he only knows that when the pressure reaches a certain level, the gas will be converted into liquid, but where does Zhang Nan know how to explain this pressure problem to Li Er and Empress Changsun, as well as the conversion between gas and liquid, so he has to continue his old job, the magic stick.

"This, the secret of heaven must not be revealed, your majesty, you think, this can convert the qi between heaven and earth into visible and tangible water, of course, this is against the sky. Knowing too much, not good. Zhang Nan continued to pretend to be a magic stick.

Unexpectedly, this time the god stick pretended to be too successful, and Li Er and Empress Changsun nodded again and again and said, "Then you better don't say it." ”

Seeing the appearance of the two, Zhang Nan couldn't help but feel a burst of amusement.