The east will be polished, a touch of fish belly white hangs in the air, and the breeze still lingers in the gloom of the night, blowing on people's faces, bringing a little coolness.

"Ruonan!"

A loud male voice broke the silence of the Du Mansion in the early morning, and the servants who swept the courtyard couldn't help but look up, only to see a young man in white running wildly on the bluestone road.

His eyes were bright, his smile was bright, and his joy was palpable.

Du Ruonan, who was originally serving the orchids under the porch, did not move, and the girl raised her face hesitantly, and her clear eyes met the running boy.

"It worked...... Whoop Woohoo ...... Ruonan I, uh, succeeded! ”

Su Zhiyu gasped, extremely excited, and his wildly dancing hands almost grabbed Du Ruonan's shoulders.

"I made it!" His eyes were as bright as the morning star, "I can't ...... the test"

His gaze swept to the servant who was probing his brain, and in the distance, the housekeeper's wife glared at him angrily, as if his behavior was out of order.

Only then did Su Zhiyu realize the distance between him and Du Ruonan: the girl's clear breath almost wrapped around him, and he lowered his head, and could clearly see her slightly trembling eyelashes and porcelain-white skin.

She was just one step away from falling into his arms. He was rushing too far ahead.

A look of shame appeared on the young man's face, Du Ruonan took a step back without a trace, and stared at him: "What did you experiment?" ”

She had a guess in her mind, but she wasn't sure for it. Last night he said he would improve the batik method, isn't it......

Pure happiness resurfaced on Su Zhiyu's face, the corners of his lips hooked slightly, and he sold Guanzi: "Well, you can go to the dyeing shop with me to find out." ”

"Yesterday we discussed a few ways to change the wax knife and different fabrics, and at first I continued to improve this until I thought about ......"

The two walked side by side, and Su Zhiyu will pass by and tell the story.

"I originally thought that different fabrics have different viscosities, and the fabric determines the adsorption ......power of the dye to a certain extent," Su Zhiyu stopped abruptly and scratched his head in annoyance.

Just now Du Ruonan looked at him with flashing eyes, obviously not understanding the meaning of "adsorption", but how to explain it? He is a science student, where does he know the ancient Chinese name of modern nouns.

"I understand." Du Ruonan chuckled, "Although the word is unfamiliar, I still roughly understand the meaning." ”

"Well, that's what it means." Su Zhiyu continued, "But then I tried it a few times, no matter how I adjusted the set variables of the control group, but it didn't work, and then I thought that if I did the opposite. ”

He deliberately lengthened his tone, stood still in place, and looked at Du Ruonan with a smile: "Guess what?" ”

"You made it." Du Ruonan looked at him and blinked.

The result was obvious, the two happened to walk to the dyeing workshop, only to see two indigo cotton silk horses dancing in the breeze in the warm morning light.

"Since I can't change the cloth, then I can change the dye, I added oleander in addition to the previous horse blue and woad indigo."

"The batik process is based on the principle of covalent addition reaction, and in the chemical industry, soda ash is usually used to achieve the purpose of color fixation. In the plant, oleander has a higher alkali content. ”

"However, because of the hurry, oleander is simply extracted, and there are still more impurities. Now the problem of fading has been solved, but the tinting strength has been reduced, and we still need to continue to improve. ”

Du Ruonan listened to Su Zhiyu quietly. The young man's hands were white from the liquid soaking, and his eyes were a little blue and black, obviously not resting well, but his eyes were bright when he spoke those strange terms.

"Good work." Du Ruonan couldn't help but speak.

"Huh?" was suddenly interrupted, and didn't hear what Ruonan said, Su Zhiyu was a little confused.

"Thank you."

The girl's eyes were sincere, which suddenly made Su Zhiyu embarrassed: "It's just some small contributions." ”

After all, eating and living are all in other people's homes, so you can't eat and drink for nothing. What's more, Du Ruonan is so young, but it may not be too hard to carry a dyeing workshop. It's very distressing to watch.

"It still needs to be improved."

The two were about to talk, but they heard the porter report: "Miss, someone came to find it, saying that it was about business." ”

Talking about business? It really came at the right time, and the two looked at each other, and they both saw joy on each other's faces.

"Please." Du Ruonan commanded.

"I've been invited to the main hall, the patriarch is accompaniing, saying that the person is looking for a wood dyeing workshop, and he happened to meet our patriarch." The porter bowed in reply.

Oh?

It's not good to make the distinguished guests wait for a long time, Du Ruonan walked to the main hall, and Su Zhiyu followed behind. The two of them walked through the flower gallery, mischievous dew sticking to their hair, and the golden light of the morning sun gilded them with a layer of gold.

The two came together, the golden boy and the girl, and they really got right.

The patriarch with white hair greeted him early, and the old man looked excited, introducing buyers for them, and the team leader looked excited: "Ruonan, your second uncle really did a good thing this time!" It's time for you to let go of your old suspicions. ”

"This buyer was introduced by your second uncle, I just listened to it, and the amount of people is not small!"

"It was indeed Du Liang's introduction." The buyer was richly dressed and nodded reservedly.

Du Ruonan and Su Zhiyu exchanged glances: The second uncle introduced it is still a big order, is he so kind?

Not long ago, I threatened to give them a good look.

Everything is abnormal, and it is a demon. That's not right.