Hearing Li Chengqian call himself, Zhang Gao didn't think about it, so he did what Li Chengqian said, as for why he did it, he might have asked before, but since last time, he didn't plan to ask, and if he asked, the prince wouldn't say, and it would make the prince feel that he was troublesome, which was not what Zhang Gao wanted.

After a while, Zhang Gao prepared all the things under Li Chengqian's instructions, and almost put the saltpeter in, but Li Chengqian didn't say how much to put in, and he didn't dare to put it indiscriminately, so he looked at his master Li Chengqian for help.

"Such a big basin, you grab a handful and put it in the basin first, I'll see the effect first" Feeling Zhang Gao's gaze, Li Chengqian thought about it and instructed Zhang Gao.

After receiving Li Chengqian's instructions, Zhang Gao grabbed a handful of saltpeter from the bag and put it in a wooden basin filled with water.

Then Li Chengqian saw that he was staring at the changes in the wooden basin, although Zhang Gao didn't know what Li Chengqian was going to do, he also squatted on the side of the wooden basin and watched.

Soon, as the saltpeter slowly dissolved into the water of the tub, bursts of white mist gradually emerged over the tub, and the temperature around the tub became lower.

And this magical physical phenomenon made Zhang Gao on the side sit on the ground in fright, looking at the wooden basin in horror, and then he suddenly thought of something, got up and was about to pull Li Chengqian to run out, although at this time he was already scared and trembling and was almost unstable, but he didn't think about running for his life for the first time, but came over to take Li Chengqian away, and this move shows Zhang Gao's loyalty.

"What's the panic, isn't it just making ice! Look at what scared you, and you found these things from beginning to end, and you also put water and saltpeter, I don't know what the hell you are afraid of" Li Chengqian dodged Zhang Gao, who wanted to pull himself away, and smiled and scolded him.

Although Zhang Gao's performance was a bit funny in front of Li Chengqian, a soul traveler, Zhang Gao's reaction still made Li Chengqian feel that this person's loyalty is okay, and he should let him help him manage some things more in the future.

"Your Highness, are you saying that what the old slave did before was making ice, not that God was angry" Hearing Li Chengqian's words, Zhang Gao got up from the ground and looked at Li Chengqian and the wooden basin in front of him cautiously.

"What God is angry, and is he making ice, you put your hand in the wooden basin to see if the water in the basin is already very cold" Li Chengqian looked at Zhang Gao with a smile, he really couldn't figure out that these ancients thought everything they didn't know was God's punishment.

Zhang Gao heard Li Chengqian's words, thought about it, and finally gritted his teeth and stretched out his hand to the wooden basin, but before he could reach in, he quickly put his hand back, and looked at Li Chengqian with a sad face, "Your Highness, the old slave still doesn't dare"

"You're still really a waste, since you don't dare, then go to the study and get a set of four treasures of the study" Before Li Chengqian finished speaking, Zhang Gao ran like a sturdy rabbit outside the yard, and he couldn't tell that he was forty or three years old this year, "What are you running, I haven't finished speaking, you just run, come back to me"

"Your Highness, what else do you command" Hearing Li Chengqian's shout, Zhang Gaoxin reluctantly returned to Li Chengqian's side, and from time to time glanced at the wooden basin that was constantly bubbling with cold air.

"When you come back later, I'm going to get 3 sets of wooden pots and clay pots like this," Li Chengqian kicked Zhang Gao angrily, and then instructed him.

And this time, after Li Chengqian finished speaking, and repeatedly made sure that there were no other instructions, Zhang Gao was kicked by Li Chengqian again, and then ran away like a fly.

Looking at the back of Zhang Gao leaving, Li Chengqian smiled angrily, squatted down and continued to observe the water in the wooden basin.

Although the water in the wooden basin is now cold, because the surrounding temperature is too high, Li Chengqian knows that it is impossible to make the water freeze, unless he is adding a handful of saltpeter, and the reason for this result is that the surrounding temperature is too high, and it is now the time when the sun is at its highest at noon, and the other is that the wooden basin is too big, if you change to a smaller one, or the water is less, it may have begun to freeze now.

But even so, standing next to the wooden basin now, it is very comfortable, and in this weather, if there is no ice at night, it is really difficult to sleep, as for Li Chengqian last night, he soaked directly in the bath water, not only did he not feel hot, but when he could feel hot, he had already fallen asleep, and he also had a small cold.

"Why is this death Zhang Gao so slow, and Xia Ju too, it's been so long, why haven't you come back yet" Li Chengqian, who was bored waiting here, sat directly on the edge of the wooden basin, scooped a bowl of cold water in the clay pot with a spoon, and looked at the gate of the courtyard.

However, Zhang Gao and Xia Ju didn't let Li Chengqian wait too long, and after he just drank the ice water in his hand, they appeared at the gate together.

And with them, there were many eunuchs and palace maids, and each of them had something in their hands, and after they came in, they all saluted Li Chengqian.

"Okay, you can leave after you put your things away, no one can come in without my order, Manager Zhang and Xia Ju stay" After speaking, Li Chengqian ignored them.

They were all commanded by Zhang Gao to put down their things and leave directly, but many eunuchs and palace maids were curious about why His Royal Highness the Crown Prince was sitting on the ground, and why it was so cool around the wooden basin, but they didn't see any ice cubes inside, and they were all driven out by Zhang Gao with these questions.

"Xia Ju, you go and mash all those fruits for me in a bowl, Zhang Gao, you follow what you just did, but this time you put a little less water in the wooden basin, mark each wooden basin with a number, and then add 1 tael of saltpeter and 2 taels of saltpeter to it, and see if there is also more water in the wooden basin, add a few taels of saltpeter, which can be made into ice cubes the fastest, and then write it down on paper" After speaking, Li Chengqian didn't care about Xia Ju, who was puzzled on the side, and Zhang Gao, who was very scared, and held the clay pot in the wooden basin before and found a shady place in the yard to sit down, I asked Xia Ju to bring herself a peach in good condition, and watched them work while eating there.

However, when Zhang Gao made ice again, Xia Ju was also taken aback like Zhang Gao before, crying pear blossoms with rain, which comforted Li Chengqian for a while, and then went to work with tears in his eyes.

But with the increase in the number of ice-making, not only is Zhang Gao not afraid, but Xia Ju is no longer scared at the beginning.

And the process of waiting was boring, before Zhang Gao's experiment was completed, Li Chengqian's drowsiness came, and then Li Chengqian saw that Xia Ju had already made some fruit puree and juice.

Li Chengqian called the beautiful personal maid beside him and fell asleep with her very elastic thighs on her pillow.