It turns out that for the emperor, as long as there is something on his own territory, everything is not a problem, and in one day, the entire saltpeter around Chang'an City has been looted.

The ice cubes produced on the second day were enough to supply the entire palace, and on the third day, it was more than enough to supply the court.

Inside the Rizheng Palace

The four ice basins are constantly emitting cold air, emitting a trace of white smoke, the heat in the whole hall is completely gone, refreshing and pleasant, once the ice cubes in the ice basin are melted, there will be a palace maid to replace it with a new ice basin, and continue to maintain the temperature in the store.

On the soft couch, Princess Changle, dressed in colorful palace clothes, solemnly held a stethoscope and was treating the eldest grandson queen lying on the soft couch.

"The queen mother's body is fine."

Princess Changle breathed a sigh of relief, took the stethoscope in her hand away from Empress Changsun's, and at the same time released the blood pressure monitor, and said happily.

Not only the students of Guozijian were on field vacation, but even the women's medical school was no exception, and they also had a month's field vacation, which was why Princess Changle was able to return to the palace and reunite with Empress Changsun.

"It's still Changle's medical skills, and the queen mother feels a lot better." Empress Eldest Sun said with a look of relief. As a princess, she didn't have to suffer from studying medicine, but Princess Changle was willing to do it for her own illness, how could this filial piety not move Queen Changsun.

"The queen mother came to laugh at me again, the child has only learned medical skills for a few days, where can he compare to the doctors, but the queen mother recovered this time, thanks to these ice basins to relieve the heat." Princess Changle said coquettishly.

The eldest grandson's qi disease is most afraid of the hot weather, which often causes symptoms of chest tightness, although there is also hidden ice in the palace in the past, but that is only in the hottest time, it can be taken out to relieve the heat, where will be such a luxury ice like now, less hot torment, the eldest grandson's qi disease will naturally improve more.

"Originally, I was going to Jiucheng Palace to escape the summer, but I was worried about separating from the emperor, and it happened that with this ice-making method, it happened that our mother and daughter could be reunited." Empress Eldest Sun said with emotion. Once you go to Jiucheng Palace, I am afraid that you will not be able to come back in a month or two, and Princess Changle will go to the Women's Medical College, so naturally she can't follow.

Although it is cooler to Jiucheng Palace, it is not an easy thing to travel and travel, and it is naturally better to be able to stay in the Lizheng Palace and enjoy such a comfortable environment.

"I heard that this saltpeter ice was invented by Mo Houye." Changle looked curiously at the surrounding ice basin, Merton's method of making ice in summer amazed her.

Empress Eldest Sun smiled slightly, "Apart from him, who else can make these strange things." ”

"Queen Mother, this ice-making method is not an uncommon thing, and it can make the queen mother's condition better, that is the best knowledge." Princess Changle pouted.

"It's still Changle and filial."

The mother and daughter were talking to each other and were happy.

"Bump!"

The door of the Lizheng Hall was pushed open by Li Zhi, who was covered with mud, and suddenly a wave of heat rushed into the hall.

"It's still cool here for the queen mother!" Li Zhi threw himself into the ice basin in front of Empress Changsun, felt the cool air, and said comfortably.

"Where are you going crazy again? How did you get covered in mud? Empress Eldest Sun doted on a handkerchief and wiped the mud off Li Zhi's face.

"Queen Mother, Merton was digging a pond there, and the child accidentally stuck a little mud?" Any child is naturally close to his mother, even if his mother is the queen, if Li Shimin was here, Li Zhi would probably have hid far away.

"Lord Mohou? Why did he dig ponds and raise fish? Princess Changle was surprised.

Empress Eldest Sun also showed a surprised gaze,

"It's for swimming to escape the heat! To build a big swimming pool, the water is blue, but it looks good! Li Zhilian said with an analogy.

"Ninth brother, what nonsense are you talking about, what's wrong with the water?" Changle touched Li Zhi's dirty face dotingly. I haven't heard of swimming pools, and the left and right are just places to bathe, but how can the water used for bathing be blue?

"Really? Don't believe it, Sister Huang, look! Seeing that Changle didn't believe it, Li Zhi immediately became anxious, reached out and took out a piece of drawing paper from his cuff and handed it to Changle.

"What is this?" Princess Changle took it and looked at it puzzled, and was immediately attracted by the scenery in the painting.

In the large pond, a pool of turquoise water, rippling in the microwave, three sides are covered with white marble slabs, and the last side is covered with sand.

Merton's summer vacation plan was naturally exposed when he accidentally bumped into Li Shimin, and Merton simply didn't do anything and dedicated the swimming pool, so as not to be found by Li Shimin in the future.

At the same time, there is also this rendering of the swimming pool, Li Shimin decided to build a swimming pool in the palace at the first sight, and Merton was undoubtedly arrested to build a swimming pool for the palace, after all, he was the only one who built this new thing.

"Beautiful?" Princess Changle was immediately attracted by the beautiful scenery in the painting.

"The beach, the sea, it's like being in the sea?" Empress Eldest Sun murmured,

"The sea?" Princess Changle's eyes suddenly lit up and fell into reverie.

The most important reason why the style of the swimming pool in later generations is so high, is that it gives people the feeling of being in the sea.

The longer she is in the deep palace, the more she yearns for freedom, the sea is the most vast, the most free representative, Princess Changle can't help but become more and more interested in the swimming pool in the painting.

In the scorching summer, on the weeping willows next to the Taiye Pool, a few of them who escaped the pursuit of the eunuchs kept chirping, adding a little irritability to the hot weather.

In front of a side hall beside the pool of liquid,

Merton was sweating profusely and directing a group of craftsmen to work hard, although with the help of Mojia machinery, the efficiency was increased by more than ten times, but the swimming pool that Merton built for the palace was much larger than the amount of work in the backyard of Mo's mansion.

"The adult area should be more than one foot deep, the children's area must not be more than three feet, the diving platform should be two feet deep, and the track should be more than 50 steps." Merton explained his requirements to the craftsmen who would be sent by the overseer.

Of course, it is not the children of the Mo family who are responsible for the construction, but the craftsmen who will be sent by the supervisor, led by a middle-aged master craftsman, whose craftsmanship is extremely superb, and can only be compared to Lao Zhang Tou and others in Mojia Village.

"Master Hou rest assured, the construction period will not be delayed." The middle-aged master craftsman sweated profusely and assured that in his opinion, building this swimming pool is the easiest thing, although the amount of work is larger, but the construction is only a matter of time, and there is no technical content in itself.

After Merton inspected again, he found that everything was working normally, and then he returned to the pavilion under the weeping willow, and found that his drawings on the stone table of the pavilion had long been gone, and then he remembered that Li Zhi's sneaky actions just now must have been taken by him.

"Brother She's naughty and took away the drawings of Marquis Mo, please forgive me!" A voice as light as a yellow bird sounded behind Merton.