All the way back to the city lord's mansion, wash up, the city lord had already arranged dinner, so several people sat together, the city lord accompanied, and had dinner.

Xiaobao was taken down, and Song Yunshu went back to the room. She knew that Chu Yuchen must have something to discuss with him, so she didn't sleep, only lit a lamp and candle, and waited with her hands on her cheeks under the lamp.

Song Yunshu looked at the small jumping candle flame, like her beating heart. I casually opened a book and flipped a few pages at random, but I didn't read a word.

I was waiting a little anxiously when I heard a soft knock on the door outside.

"Come in." Song Yunshu said, and then got up from the chair.

Chu Yuchen pushed the door in, and saw that Song Yunshu was dressed neatly and did not fall asleep, so he couldn't help but make fun again.

"Wait for me?" Chu Yuchen asked deliberately, and then moved a chair and sat casually.

Song Yunshu nodded.

Although Chu Yuchen knew that Song Yunshu was waiting for him because of official business, his heart was still warm.

"Now no one makes tea, and there is no tea to drink." Song Yunshu said.

Chu Yuchen waved his hand: "No need, I have already used tea." ”

Song Yunshu moved a chair and sat opposite Chu Yuchen, chatted a few words, and Chu Yuchen asked, "Regarding the water source, do you have any way to solve it?" ”

Song Yunshu's brows twisted slightly, Chu Yuchen immediately noticed it, and said with relief at the moment: "It's okay if there is no way, after all, this is not a simple matter."

"We can take the long view and take our time."

Chu Yuchen's thoughtfulness fell in Song Yunshu's eyes, soft.

"It's not that there is no way, it's just that ......" Song Yunshu stopped here when he said it.

Chu Yuchen straightened up and listened carefully.

"It's just that this method is a bit complicated, and I don't know if I can do it now." Song Yunshu then finished speaking.

Chu Yuchen's eyes shone with joy: "Don't worry, you just let it go." Regardless of success or failure, everything is with me. ”

As he spoke, he leaned over and gently placed Song Yunshu's hand in his palm.

Song Yunshu nodded: "Okay, I'll try my best." After thinking about it for a while, he knew that Chu Yuchen must be very curious about this method, so he continued.

"Actually, the principle is very simple. It's to find a way to use a thing to separate the iron in the water. Then the water can be used normally in the future. ”

Chu Yuchen tilted his head and thought for a while: "Presumably, this thing is relatively rare." After all, I've never heard of it. ”

"Exactly." Song Yunshu said.

After chatting a few more words, Chu Yuchen said goodbye and left.

Song Yunshu sent it to the door, and the moonlight outside the house sprinkled on the ground like hoarfrost.

Song Yunshu watched Chu Yuchen's back leave, Chu Yuchen turned around a few times and waved her back.

Song Yunshu saw that he was walking far away, so he turned around and went back to the latch to the door.

Hiding in bed, tossing and turning, it is difficult to sleep.

In this day and age, how should a filter that can filter iron substances be made?

Song Yunshu was a little thoughtful: if it can be made, then it can be regarded as benefiting the people.

After thinking about the candle flame for a long time, I had some rough outlines in my heart. Of course, there are still many details to consider, whether it can be done or not, and there is no bottom in my heart at this time.

The moon outside the window sank a little more in the west, and Song Yunshu felt sleepiness hit him.

Blowing out the candle flame, he finally fell asleep.

The next morning, Song Yunshu had just gotten up, and the little girl came to report, saying that Chu Yuchen had gone out beforehand.

Song Yunshu said "I know", got up to wash, and after breakfast, Song Yunshu took out a pen and paper.

She drew a rough outline on the paper and listed the things she needed to use them.

In this way, I drew and changed, changed and painted, and the things I needed were listed in dozens of ways, and I tossed it for more than an hour.

Song Yunshu thought to herself: If in the era she lives in, this is not easy.

After making these preparations first, Song Yunshu took the paper and ordered people to prepare the car.

Whether it works out or not, you have to give it a try.

The third son naturally immediately followed: "The master wants to go out?" Song Yunshu nodded.

The city lord was worried about Song Yunshu's safety, so he sent a few people to follow with the carriage, but Song Yunshu waved his hand: "No need, it's enough to have a little third son." ”

When the lord of the city heard this, he signaled them to disperse.

"I'll probably be back later." Song Yunshu said to the city lord. She kindly reminded him that he didn't have to let the kitchen cook lunch for her.

Song Yunshu knew that it would take a long time to buy these materials, and some things that were not available still needed to be changed temporarily, and they would not be able to go back for a while.

The lord of the castle respectfully replied, and the master and servant went out into the lively street together.

After tossing for a few hours, I almost walked the streets and alleys.

The third son reminded: "Master, it's time for you to eat." ”

Song Yunshu only found out at this time that his stomach was growling with hunger, so he found a restaurant and ate a few bites randomly, and did not forget to prepare a separate one for the little third son.

She plunged headlong into the pile of materials again.

He was busy until the sun was about to set, and the materials needed were not ready, Song Yunshu knew that he couldn't get it together today, so he ordered the carriage to go back to the city lord's mansion.

By the time Song Yunshu returned to the City Lord's Mansion by the moonlight, candles had already burned in the mansion.

Song Yunshu said to the third son: "Go and inquire, has the prince come back?" ”

The third son responded and went immediately. After taking a few steps, I saw someone coming over from Chu Yuchen's side.

"The prince said, I'll come to find the son later."

Song Yunshu nodded, she knew that although the two of them were entangled in trivial matters, their hearts were tied to each other.

At dinner, they finally met Chu Yuchen, and the two hadn't seen each other for a day, but Chu Yuchen felt as if it had been a year apart.

It seems that that sentence is really true, a day without seeing each other is like three autumns, especially people like them who have always been in love.

Even Song Yunshu, a modern person, didn't feel shy in his heart.

The seats of the two were next to each other, and Chu Yuchen moved his chopsticks first to serve food to Song Yunshu.

As soon as Song Yunshu saw that the city lord was still accompanying him at the last seat, he was a little uncomfortable, and coughed lightly to cover it up.

Chu Yuchen didn't care about it, but just said, "Lord Song has been busy for a day, and it's really hard. As a prince, he should be compassionate. ”

The lord of the city hung his head, and his eyes were fixed on the bowl in front of him, pretending that he had not seen or heard.

Now that Chu Yuchen only calls her like this on formal occasions, Song Yunshu is almost a little unfamiliar,

Seeing the city lord's somewhat uncomfortable expression, he didn't know what to say.

can only say in a high-sounding voice: "Thank you, the prince." ”

Chu Yuchen continued: "You're welcome. ”

Song Yunshu quickly finished eating, and retired from the table with Chu Yuchen, and the city lord was pardoned.

The two talked about the water source again, and Song Yunshu went to bed early that night.

After being so busy for a few more days, the Heavenly King came to find Song Yunshu.

"Lord Shangshu, I recently investigated several farmers, and everyone agreed that it was a water problem."

Song Yunshu nodded: "I was about to tell you this, this water contains a lot of heavy iron, no matter what crops are planted, there will be no good harvest." ”