My Lord, my wife said she doesn't have time to talk to you.

Seeing that the ice in the bowl was almost formed, Huaying called Dongxue, who was playing with the egg yolk, to come and take a look.

Dongxue was surprised to see the ice that only appeared on the river surface in winter appear in the bowl held by Huaying, her eyes wide open, "Sister Huaying, how did you leave the ice from winter in the present? Hey, that's not right, wasn't it water just now?"

"Sister Huaying, you are not a fairy from heaven, are you?" Dongxue covered her mouth and looked at Huaying in surprise.

"Silly girl, these ices can be made. The production process is a long story and I will tell you later. Now our cold noodles don't have to worry about going bad." Huaying said happily while holding Dongxue's little face.

Although Dongxue didn't know how to make ice, she thought Sister Huaying was more powerful because she could put winter ice in a summer bowl.

Suddenly thinking of something, Dongxue grabbed Huaying's sleeve and frowned, "Sister Huaying, you can't tell others that you can make ice, otherwise the witch will think you are a monster and burn you to death."

"I won't tell you either. I won't tell you either. Just do it secretly at home and don't let anyone find out." Dongxue looked worried. If the villagers knew that Dongtian Bing appeared in the summer, they would spread rumors that Sister Huaying was a monster.

Huaying suddenly remembered that this was ancient times. It was okay to accept new foods, but these things that were in stark contrast to the seasonal ones would arouse people's suspicion.

She was so happy that she didn't realize the seriousness of the problem. Huaying looked at Dongxue gratefully, secretly feeling lucky to have such a considerate girl next door.

After chatting, the two of them kneaded twice as much dough as usual. Dongxue originally wanted to stay and wait for the noodles to be washed, but Huaying urged her to go back and rest early as it was getting late. She just had to stay by the basin and wait for the noodles to be washed. Dongxue then picked up the bamboo basket and went home.

Fu Shiyan returned home and saw Huaying washing noodles in the kitchen. Seeing that the amount of noodles was twice as much as usual, he washed his hands and started washing noodles as well.

Huaying, who was immersed in her own world, was startled by a cough behind her. "What are you thinking about? You were so engrossed that you didn't even hear me calling you." Fu Shiyan came over, rolled up his sleeves and asked her in a gentle voice.

"Wash your face first, I'll think about how to tell you." Huaying didn't know whether she should tell him about the saltpeter. How would he look at her when he knew it?

As night fell in Taohua Town, Shen Nanting and Yue Xing came to a crossroads. Yue Xing pointed to a shop that was being renovated and said, "Sir, I heard that this shop is related to the young lady. The owner of the shop is Doctor Fu from Tongxin Hall, and the young lady has a close relationship with him." Looking at the frowning young master, Yue Xing's voice became smaller and smaller.

"What does a close relationship mean?" Shen Nanting asked in a low voice.

"I don't know." Yue Xing lowered his head and said nothing more. The two found an inn and waited until tomorrow morning to look for Huaying again.

After washing her face, Huaying hesitated for a moment, but decided to tell Fu Shiyan about the saltpeter.

After wiping the water stains off her hands, Huaying said to him, "Fu Shiyan, I have something to tell you... Look at this." Huaying brought the prepared ice and placed it on the table.

Fu Shiyan's eyes swept over her hesitant expression, then fell on the bowl on the table. When he saw the contents of the bowl clearly under the light, his eyes were shocked. He turned his gaze to Huaying again and asked, "How did you do it?"

Seeing that he didn't seem that surprised, Huaying joked, "You don't think I'm a monster, do you?"

Fu Shiyan said seriously, "There is ice in the imperial palace in the capital in summer because there is an ice cellar. This little ice of yours is obviously made."

Huaying tilted her head, smiled and gave him a thumbs up. This guy is not only good-looking and good at calligraphy, but also smart.

"The reason why I can make ice cubes is because I found something called saltpeter in the back mountain. When it comes into contact with water, it absorbs a lot of heat, causing the water to freeze." Huaying told him what happened today.

"So there is natural saltpeter in that cave?" Fu Shiyan was also surprised by her discovery.

If it is true as Huaying said, making gunpowder is the first task, because weapons are ultimately no match for cannons.

But now that he has a special identity, these things will have to wait a long time.

"This matter should not be publicized. Doing business with saltpeter is not as simple as you think. Many things require customs clearance documents. This matter cannot be rushed and needs to be done slowly." Fu Shiyan offered a pertinent suggestion.

Huaying nodded in agreement. It was impossible to get rich overnight. It took a long process for these things to be discovered, recognized and put into use. She was already content to solve the storage problem of the cold noodles in front of her.

After washing their faces, they chatted for a while before returning to their room to rest.

Fu Shiyan returned to his room, changed into night clothes, and used his light skills to go to Taohua Town again through the back window.

Fu Yi, who was preparing to rest in Tongxin Hall, pushed open the door and found that his master was writing something. He quickly squatted and saluted, saying, "I didn't know that the master would come. I'm sorry for not coming to greet you."

"Forward this letter to Fu Lei and ask him to reply to me quickly." Fu Shiyan handed Fu Yi a note.

"Yes." Fu Yi picked up the note and walked out.

Fu Shiyan went to visit Shi Nuan again. Seeing that she was asleep, he did not disturb her. He just put a jade pendant he brought out of the secret room next to her pillow. It was a jade pendant left for his younger sister by his mother's dowry. Seeing that Shi Nuan's skin was much rosier while she was sleeping than when he first found her, Fu Shiyan smiled.

"Master." Fu Yi's voice came from outside the door.

After covering his little sister with a blanket, Fu Shiyan left the room and the two of them came to the study. Fu Shiyan sat down and drew a map of the back mountain of Taohua Village. He said to Fu Yi, "Tomorrow you find a smart person to go here and find a cave with white stones on the ground. Ask him to bring back some gravel."

Fu Yi stared at the blueprint and asked curiously, "Is there something strange about the stone?"

"Almost. If it's really as Huaying said, it will give us another weight to do in the future." Fu Shiyan said slowly, tapping the table with one hand.

The next morning, Dongxue came to Huaying's house early to help wash vegetables and load them into the car. After the three of them were almost done, they had breakfast and went to town.

Shen Nanting and Yue Xing were waiting for Hua Ying at the crossroads. After a while, they saw their little sister walking over with a handsome man and a little girl, talking and laughing, pushing a cart.

Yue Xing hurried over to help, but was stopped by Shen Nanting. The two found a noodle shop not far from the intersection and sat down. Shen Nanting watched Huaying, who hadn't seen her for several months, skillfully setting up the stall and rolling up the cold noodles, and his eyes gradually became misty.

Before he could think about who the man next to her was, he saw the man standing in front of the stall and saying something to the girl before turning around and going to the shop opposite which was being renovated.

So the store belongs to this man, "Is that Doctor Fu?" Shen Nanting asked Xiang Yuexing.

"No, I've met Doctor Fu." Yue Xing didn't know who this handsome man was.

The two continued to observe the Huaying and Dongxue in the distance. Shen Nanting suddenly stood up and told Yuexing to wait here, and walked towards his sister's stall.