Ran Fang and Zhang Liang glanced at each other, and at the same time saw a smile in their eyes.

Zhang Liang took the initiative to explain: "Madam, my lord has put a warm water channel on each floor of this restaurant. ”

"Knowing that the adults are coming over today, I will let people use this warm water channel, so that the adults can see if the effect is satisfactory?"

"Warm water channel?" Xiang Jin was a little puzzled, not understanding what they meant by this.

Seeing that she still didn't understand, Zhang Liang suddenly felt a very proud feeling.

Pointing to the exposed pipes in the house, he explained: "That is, on each floor of the ground, an empty passage is laid, and when the weather is cold, wood is burned in a fixed place to heat, and the heat is transmitted through the passage, and the house is hot." ”

"Even if it's winter, the room will be warm, and the guests will be very satisfied."

"This is what the adults came up with, I'm afraid there will be no inn in this city that can have us!"

Following what Zhang Liang pointed out, Xiang Jin saw the pipe he said, and then remembered that he had seen it in the courtyard before, and thought that Ran Fang was studying something, but he didn't expect it to be this thing.

"I see."

She had said enough of the praise, but the admiration in her eyes couldn't be hidden.

Ignoring her surprise, Ran Fang looked at Zhang Liang and asked, "Are you ready for what I asked you to do?" ”

"It's done!"

Xiang Jin looked at them with a puzzled expression, but he had no choice but to keep up with them and walk towards a corner on the first floor of the tavern.

When she walked into the house, she didn't seem to have seen anything in it.

Pushing the door open, there was a hollowed basin on the opposite side of the door, and there was a cylindrical thing under the basin, which was connected to the ground, and on top of the basin was a wooden box, and under the box there was something that could be pulled apart.

Zhang Liang stepped forward and pulled the thing away, and several thin streams of water flowed out of it, which looked very magical.

And the water did not even fill the basin, but flowed down the hole in the basin, as if it were flowing down the pipe.

"My lord, this is done."

"The tube of the water tank is left outside, and if there is a shortage of water inside, it will be automatically replenished, as long as you pay attention to whether the water tank outside will be short of water."

Before Xiang Jin could understand what he was going to do, Zhang Liang opened a door next to the platform and walked a few steps inside.

She saw that there seemed to be a chair inside the door, but the middle of the chair was empty.

On top of that, there is also a water tank at the back of the chair, which looks very similar to the one just now, but is much smaller than the one.

Just when she was stunned, Zhang Liang stepped forward again and pressed some of the things in this water tank, and suddenly there was a "boom", and the water in the water tank plummeted.

Only then did she see that there was an empty pipe inside the chair, and the water from the tank just now had entered the chair, but in the end she didn't know where it flowed.

And the water in the tank turned out to be slowly full again.

"This ...... It's amazing! ”

"Xianggong, what is this?"

Zhang Liang also looked at Ran Fang with burning eyes, he just made these two things according to the instructions given by Ran Fang.

At that time, he also thought it was amazing that there were such things in the world, but he racked his brains and couldn't figure out what these things were for.

Sensing their doubts, Ran Fang smiled and explained: "This thing is a toilet, a place to use the toilet. ”

"Just sit here, and when you press here after going to the toilet, the filth will flow down with the water, so you don't have to use someone to pour it out."

"The things outside are for washing your hands, so wash your hands here after going to the toilet, keep it fast."

Hearing his explanation, Xiang Jin nodded again and again, she was shocked too much today.

Before she could open her mouth to praise, she saw Zhang Liang suddenly covering his mouth, bending over, and then running out.

In their incomprehensible eyes, Zhang Liang's vomiting sound could be heard through the wall.

After a while, when Zhang Liang came in, he saw Ran Fang's puzzled expression, and he didn't know whether to explain it for a while.

"What's wrong with you?" Ran Fang took the initiative to say with concern, "Your face is so pale, but you have been too tired these days?" ”

"If you are unwell, this matter will be watched by someone else, and you can rest for a few days."

"No, no!" Zhang Liang hurriedly waved his hand, his eyes looked at the toilet, then at Ran Fang, and finally lowered his head and said in a low voice, "The subordinates are fine." ”

"It's just...... The subordinates thought that this thing was used to wash things, and that day ......"

"I was so thirsty that day, so I drank a few sips of the water from this tank......

"But I don't think about it, it's ......"

In the end, Zhang Liang couldn't say anything about the words in his mouth, but Xiang Jin and Ran Fang both understood what he meant, and there was a hint of a smile in their eyes.

Ran Fang stepped forward, patted him on the shoulder, and said with a smile: "It's okay, this is clean water." ”

"No one has used it yet, and even if you drink it, it doesn't matter."

Hearing Ran Fang's words, Zhang Liang covered his mouth, and his eyes didn't dare to look at the toilet bowl at all, "My lord, don't say it." ”

"Or else...... The subordinates can't help it. ”

"Okay," holding back a smile, Ran Fang walked out of the room first.

When she came out, even Xiang Jin had a smile in her eyes, and the sadness of Xiang Yu and their departure just now had been completely forgotten by her.

Several people laughed for a while, and then Xiang Jin remembered, and asked with some confusion: "My lord, how can the water fill up by itself?" ”

Ran Fang paused and explained, "This is a principle called the siphon phenomenon, and you may not be able to understand what I said. ”

"Roughly speaking, it is to convert the potential energy of water into kinetic energy, so that the filth in the toilet bowl will be discharged along with the sewage."

"It is to use the pressure difference of the water column to make the water rise and then flow to the lower place, as long as the water here is gone, and it will not flow to the bottom of the pipe, then the outside tank will automatically flow the water here."

"Just make sure that the tank is more and higher than that."

"It's always easier to add water outside than to fill it inside."

Although Xiang Jin and Zhang Liang didn't understand, they still nodded, although they didn't understand in their hearts, they didn't want to ask again.

"This ...... I've never seen anything like this. ”

"Is this some kind of spell?"

Xiang Jin didn't know how to explain it, and after thinking for a while, he could only use spells to explain all this.

Hearing this, Ran Fang smiled, and that smile did not have any mockery.

"It's not a spell, it's science."