According to the records of "Zhou Li", in order to ensure the use of ice cubes in summer, the Zhou royal family once set up a corresponding agency to manage the "Ice Administration", and the person in charge was called "Ling Ren".

It is probably during the cold season every year that thick ice forms on the surface of the river, and the ancients began to dig ice for storage at this time.

They believe that this is when the ice is the hardest and does not melt easily.

At this time, the officials who were in charge of the ice storage would supervise the slaves and peasants to dig the ice in a place with good water quality and hide it in the ice cellars prepared in advance.

Ice cellars where ice is stored are mostly built in shady places, deep underground.

Slaves and peasants used fresh straw and reed mats to lay on them, and after placing ice cubes on them, they covered them with rice bran, leaves, and other insulating materials.

Finally, they sealed the cellar and waited for the ice cubes to be enjoyed the following summer.

After all, in ancient times, there were no refrigerators, and there were not many ways to make ice cubes in the summer.

People who want to get a little coolness often have to pay a huge price.

As for the ice cubes, it is a luxury that only the princes and nobles can enjoy.

Of course, after the discovery of gunpowder by alchemists.

Saltpeter has also become one of the options for making ice cubes.

It's just that the method of making ice from saltpeter has not spread.

And there are even fewer people who know this method.

In Huang Tinghui's mind, he remembered the principle of why saltpeter could make ice cubes.

Saltpeter is a white, bitter crystal, and when dissolved in water, it absorbs a lot of heat, lowering the ambient temperature and causing it to freeze.

If Huang Tinghui wants to make popsicles, saltpeter ice is the best choice.

"Lian'er, is the mung bean porridge you prepared ready?" Huang Tinghui turned his head, looked at the little girl and asked.

"Uh-huh!"

"Husband, I've been ready for a long time!" Wu Feilian straightened her chest proudly, and she quickly took the mung bean porridge that had been prepared long ago.

Huang Tinghui smiled, he found a large bucket of water, "Look at it!" ”

With that, Huang Tinghui put saltpeter into the water.

It can be seen with the naked eye that the surface of the water quickly formed ice cubes, and the condensed ice crystals quickly covered the water surface.

There was even a hint of chill emanating from the ice, and a chill came to the face.

Looking at the condensed ice crystals in the barrel, everyone was stunned for a while.

And that's it?

Is it really frozen?

Even if Lu Daoming, a scholar, faced this situation, he couldn't say one, two, or three for a while.

"Tinghui, isn't this immortal art?" Lu Daoming pointed to the condensed ice in the barrel and said to Huang Tinghui.

"Where did you come from any immortal art in this world?"

"It's nothing more than science!"

Huang Tinghui smiled, he didn't explain more.

Unlike another era, saltpeter ice did not spread, and even if a rich boy wanted to eat some ice cubes in the summer, he could only satisfy his cravings by cellaring ice.

Therefore, Lu Daoming did not understand the principle of the matter in front of him, so it was not surprising.

"Come on, come on!"

"Chisel this ice into pieces, Daoming, I'll leave the ice chisel to you!" Huang Tinghui said unceremoniously to Lu Daoming.

"Huh?"

"Chisel ice?"

"Tinghui, this ......"

Lu Daoming looked at Huang Tinghui with a confused expression.

……

After the ice cubes were chiseled up, Huang Tinghui filled the mung bean porridge in the mold that had been prepared.

Place the mold of mung bean porridge in ice cubes and let it rest for a while.

After a while, the mung bean porridge in the mold formed ice bricks.

This is the popsicle that Huang Tinghui wants to make.

"Wow!"

"It looks good, mung bean porridge ice bricks."

"I don't know what it tastes like?"

The three girls stared at the ice bricks, intently, with a curious look.

Huang Tinghui also smiled when he saw this, "This time the preparation is a little rushed, it's the first time to make popsicles!" ”

"After that, we have to find a way to improve it!" Huang Tinghui seemed to be talking to himself, he was thinking about something.

After saltpeter is made into ice, a chisel of ice is chiseled, which Huang Tinghui did not think about before.

Of course, we will have to improve it in the future.

"How about you taste it?" Huang Tinghui said to Lian'er and the other three.

Mung bean porridge was made by Huang Tinghui for the little girl, and some of the ingredients may not be complete.

I don't know how it tastes either.

"Uh-huh!" The little girl couldn't stop nodding and said.

As soon as the words fell, the third girl put the mung bean porridge frozen into ice bricks into her mouth.

A cool feeling melted in her mouth, and the little girl's eyes lit up in an instant.

"Hmm!" The little gluttonous cat was eating a popsicle made of mung bean porridge, and she couldn't stop saying to Huang Tinghui, "Husband...... Husband......"

"It's delicious, it's delicious!"

"It's so sweet, it's so cool, it's so cool to eat!"

"Husband-kun is amazing, amazing!"

The little girl ate a popsicle and shook Huang Tinghui's hand and said.

"It seems that there is something to eat, but it can't stop your mouth!"

Huang Tinghui nodded Wu Feilian's forehead with a smile, and said very dotingly.

"Lian'er is a little gluttonous cat!" The little girl ate mung bean porridge popsicles and said to Huang Tinghui.

"The flesh is numb!"

"Goosebumps!" Shen Rou rubbed her arms and said to Huang Tinghui and Wu Feilian.

"But Huang Tinghui, your popsicle is really delicious!"

"It's not particularly hot at the moment."

"If the weather is hot, this popsicle can cool down and relieve the heat, ordinary people should like it very much!"

Shen Rou was eating popsicles, and she also looked refreshed, she said to Huang Tinghui.

"That's a good thing!"

"Lian'er, your husband looks like a pleasing little white face, this skill is really good."

Hearing Shen Rou's words, Huang Tinghui was extremely speechless for a while.

When this girl praises herself, why can't she stop losing a handful?

"Uh-huh!"

"Huang Gongzi, in the future, this popsicle can't be missing from my family!"

Chen Qiuniang was talking, and she also instructed Huang Tinghui.

"Qiu Niang, you've eaten a lot!" Lu Daoming said to his own lady.

"Got it, got it!" Chen Qiuniang replied while eating a popsicle.

I saw Chen Qiuniang pick up a popsicle and put it in Lu Daoming's mouth.

"Husband, try it too!" Lu Daoming naturally couldn't resist his own wife, so he could only pick up the popsicle and eat it.

"Tinghui, even if your craft is in the palace, it will definitely be liked by those nobles in the palace!"

"If you sell popsicles, you should sell them well!"

Lu Daoming just tasted a mouthful of mung bean porridge popsicle, and couldn't stop praising to Huang Tinghui.

"It's all some tricky gadgets, and tomorrow the Yundian Pharmacy will open!"

"These things can be regarded as a little welfare for the people who come to celebrate our opening, and they can also be regarded as a means to start the fame of our Yundian Pharmacy."

"In the future, this thing can also be used as a store feature!"

Yundian Pharmacy does not have much fame in Ruian County, and it can also be used to make the store famous.

is like a big reward for opening in later generations, otherwise Huang Tinghui would not have bothered to come up with these things.

……