The tea seedlings, blueberry seedlings and citrus seedlings in Shandandan Village have all been planted.

The children rested for a few days and then went to Qiuzhi School.

When Yiya Mi's store is busy, she is busy in the store. When the store is not busy, she is alone in the backyard tinkering with something.

Gu Beijian had been there for a long time, but Yi Yami didn't notice him.

He couldn't help but ask, "What are you doing?"

"I'm studying how to make a toothbrush that is both soft and flexible." Yiyami replied.

"Toothbrush?" Gu Beijian wondered as he sat down.

"Yes, I'm tired of chewing willow twigs like a camel every day. And if I don't use willow twigs, I can only use salt water, which can't achieve a perfect cleaning effect. My teeth will rot in the long run." Yiyami said while studying and complaining.

Gu Beijian nodded. "I also feel that rinsing your mouth every morning is not very comfortable."

"Yeah, you think so too!" Yiyami nodded, then tidied up the pig bristles in his hand, rolled them into a ball, pinched them tightly, and then used needle and thread to pass the pig bristles through the holes on a bamboo piece full of holes, sewed it up, and fixed it.

Gu Beijian was mesmerized watching from the side. "Yiyami, besides being a good cook, you are also a good embroiderer!"

"You're exaggerating, buddy. I just know a little bit about needlework." Yiyami said with a smile.

After Yi Yami finished one toothbrush, Gu Beijian said, "Can you let me try this one? I'll tell you how I feel after I use it."

Yi Yami smiled and nodded, "Okay, then take this box of tooth powder back and try it together." Yi Yami handed Gu Beijian a small wooden box.

Gu Beijian opened it and saw that it contained a gray-green powder. He asked suspiciously, "What's in this?"

"Tooth powder is a powder specially used for brushing teeth. I have been debugging this formula for a long time. The effect should be good. You can try it and give me some feedback when the time comes." Yiyami continued to sew the toothbrush.

"Gu Beijian, you know how to brush your teeth, right?" Yi Yami looked at him puzzled.

"Just put it in your mouth and brush it?" Gu Beijian asked tentatively.

"It seems you don't know how. Let me teach you." Yiyami took the newly made toothbrush and gestured to him.

This was the first time Gu Beijian was invited to brush teeth together. Yi Yami was really a freak.

She was quite open about it, but Gu Beijian felt a little embarrassed.

"What are you standing there for? Come here." Yi Yami took two bamboo tubes filled with some water and handed them to Gu Beijian.

Gu Beijian walked forward and took the water.

"Look, like this, first use the toothbrush I made to dip a little of this tooth powder. You can take a sip of water before brushing your teeth to moisten your mouth, or you can brush dry, it's all fine." Yi Yami took a sip of water, spit it out, and then looked at Gu Beijian.

Gu Beijian had no choice but to drink a sip of water slowly, then imitated Yi Yami and spit it out.

"Oh, that's right. Then, hold the toothbrush at a 45-degree angle, like this. When brushing your upper teeth, the bristles should face upwards, and when brushing your lower teeth, the bristles should face downwards." Yi Yami grabbed Gu Beijian's hand and demonstrated how to use the toothbrush.

Gu Beijian didn't know whether he was embarrassed or moved, his face was blushing.

"Did you hear what I said?" Yiyami asked.

"Oh oh oh oh, I heard it, I heard it!" Gu Beijian replied.

"Okay, then move horizontally, brush every tooth, including the gaps. Then stay on each tooth a little longer, then move to the next tooth, and then move slowly between the two teeth, with some overlap. Also, the sides of the teeth, the bottom of the upper teeth and the top of the lower teeth need to be brushed. Brush at least twice a day. Rinse your mouth in time after meals to better protect your oral teeth." Yiyami taught him while brushing.

This scene is a bit too strange. Two people are standing in the yard, staring at each other with eyes wide open, bubbles in their mouths, and the brushes in their mouths are still brushing non-stop.

Yi Xiaomai passed by after school and thought the two people were poisoned, so she immediately surrounded them and asked, "Sister, what's wrong with you?"

"Oh, brother, I'm brushing my teeth. Do you want to brush together?" Yiyami opened his mouth and some bubbles flew out. Gu Beijian couldn't help laughing when he saw this scene, and he sprayed out a large mouthful of white foam.

Seeing this, Yi Xiaomai shook her head and said, "I can't..."

"You try it. You should start brushing your teeth from childhood. Brush your teeth well, otherwise you will have bad teeth in the future and your appearance will be ugly." Yi Yami did not allow him to refuse. She picked up a small toothbrush, dipped it in tooth powder, and taught Yi Xiaomai how to brush.

When the other dolls saw this, they also wanted to try this new thing and expressed their desire.

Fortunately, Yi Yami had almost finished making them for everyone before Gu Beijian arrived.

Line up the dolls and start teaching.

Gu Beijian also took a toothbrush and started to teach the kid who couldn't do it.

When He Huaizhu walked out of the kitchen, he saw a row of people standing in the yard, standing there with white bubbles in their mouths.

"Hiss, what's wrong with you? Did you eat something bad?" He Huaizhu rushed over anxiously, without even having time to put down the water scoop in his hand.

"Hmm..." Yi Yami quickly took a breath, gurgled a few times, and said to He Huaizhu, "Mom, it's okay, I'm just telling them to brush their teeth. Don't worry, they didn't eat anything bad."

"That's good. I was really scared." He Huaizhu looked at the bubbles coming out of their mouths and found it funny.

Everyone looked at each other and laughed happily.

"Girl, I've seen you tinkering with this for days now. So you're just tinkering with this thing..."

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