Although as a chef and a food lover, Eisen is naturally interested in the variety and novelty of the food street, but every time he passes by a stall, Eisen's face becomes more worried.

It's not that Eisen is dissatisfied with the food, but because they are the number one foodie who plays the Legion, and it is a lion's mouth in this food street.

As long as it is a snack that Han Yan can see, she doesn't let it go at all like a robber, except for those weird snacks made by poisonous insects...

Aisen was also deeply affected by this, seeing that his money bag was getting more and more empty, but he couldn't say anything, because of the previous promise to Han Yan, this time Han Yan traveled with food and clothing, and he Aisen could be regarded as taking care of everything.

In this regard, Han Yan was not polite at all, mercilessly emptying Aisen's money bag, and intentionally or unintentionally showing a happy smile.

And Ai Sen naturally knew that Han Yan was angry and deliberately made things difficult for him, but in this regard, Ai Sen could only shake his head helplessly, cover it with a wry smile, and secretly reprimanded Han Yan for having such a large belly that he could even eat a kun.

"You eat slowly, my little ancestor, I'm surprised, why are you still so slender when you eat like this?", Aisen held his head, looked at the cold face of the feast, and sighed lightly.

Previously, Aisen thought that there was no non-fat physique in this world, as long as a certain amount of nutrition was taken, even thin people could gain weight.

But when he met Han Yan, Aisen realized that nothing is impossible, this Han Yan is a typical example, he eats more than anyone else and looks thinner than anyone else.

"Hmm, who can blame this, it's not fat, it's not fat, Tencel..."

The boss with a cold cheek and a drum hummed and chirped, making an unclear sound, and he couldn't say a reason for talking for a long time.

"Forget it, don't talk about it, hurry up and eat the food in your mouth."

After listening to it for a long time, I couldn't hear what Han Yan was saying, so Aisen simply gave up communicating with her, like a little pig, and asked her to eat quickly.

At this moment, Qin Ya suddenly handed Aisen a five-color marshmallow and said with a smile, "Aisen, eat this, this five-color marshmallow is like magic, mixing a lot of different flavors, it's very delicious."

Seeing this, Aisen also gratefully accepted the five-color marshmallow handed by Qinya, and after a careful observation, Aisen also knew why this marshmallow was called a five-color marshmallow.

As the name suggests, this marshmallow is made up of five different colors of sugar strands, and the coordinated structure is like a rainbow on the horizon, which has a unique beauty that will make people appetite.

Under the expectant eyes of Qinya, Aisen also carefully tasted the five-color marshmallow in his hand.

As Qin Ya said, this colorful marshmallow, from the inside to the outside of the taste buds of Aisen appeared a total of five flavors, namely apple, lychee, orange, vanilla, peach five kinds of sweet taste, each taste is appropriate sweet and sour, consistent with each other, but it makes people appetite and sweet.

"Thank you for the marshmallows," Aisen chuckled with a sweet smile on his face.

Although Aisen usually doesn't like sweets, this marshmallow made him taste a different taste, so Aisen has a new insight into sweets.

"Hehe, don't laugh at me, in fact, I like to eat sweet things the most, and Xinxin also likes to eat sweet things like me, and whenever I eat sweet things, I will be very happy."

"Maybe it's because sweets contain some mysterious substances that can make people feel happy," Qin Ya sighed as she enjoyed the sweetness of the colorful marshmallows, with a sweet smile on her face.

"Eun, Xinxin likes to eat sweet things like her sister, because if you eat sweet things, your heart will become very sweet", Xinxin took a big bite of the marshmallow and smiled sweetly.

Hearing Qinya's words, a flash of light suddenly flashed in Aisen's eyes, and then explained to Qinya and Xinxin in a serious manner.

"Eating sweets can make people happy, but there is a scientific basis, because eating sweets can promote the secretion of dopamine in the human brain to control the mood..."

"Dopamine is a substance that can transmit happiness and make people excited and happy, so when you eat sugar, it will make people feel happy, but you can't eat too much sugar, and if you eat too much, you will get tooth decay, and it hurts when you extract your teeth."

On the earth, Essen has a strong desire to explore everything, so when he encounters any problem, Essen will first explain this question from a scientific point of view.

When Eisen could not explain it with science, he would forget to sleep and eat, constantly consult information, constantly put forward new theories for scientific verification, and finally find the answer behind the problem with continuous research.

"Dopamine?... It's a material thing that makes people happy."

Because there is no concept of dopamine in this world, when Qinya heard Eisen say this term, she was puzzled and simply summarized it as a happy substance of creation.

"You're not wrong to say that, it's just..."

Then Ai Sen made a lot of explanations to Qin Ya, of course, until the end, Qin Ya did not understand what Ai Sen was talking about, but despite this, Qin Ya still held her chin and listened to Ai Sen's serious narration very intently.

"So in general, dopamine is a neurotransmitter that is primarily used to help cells deliver impulses. This kind of brain secretion is related to human lust and feelings, and it transmits information of excitement and happiness", Eisen raised his head, gestured with his hands, and summed up Qin Ya in a serious manner.

"Giggle~~~"

But just as Aisen finished speaking, Qin Ya suddenly burst out laughing, with a beautiful bright smile on her face.

For Qin Ya's sudden smile, Ai Sen was also quite puzzled, and didn't understand why Qin Ya laughed, for a while, Ai Sen thought that the knowledge he said was wrong, which made Qin Ya laugh.

However, after thinking about it carefully, Ai Sen was very sure that there was nothing wrong with the knowledge points he said, and Qin Ya could not laugh because of this, after all, Qin Ya was completely incomprehensible to this kind of knowledge field, let alone be able to find possible errors in Aisen's words.

"Sister Qin Ya, why are you laughing? Could it be that there is something wrong with what I said?", he was really puzzled, but Aisen still asked the question in his heart.

"No, no, Aisen, you spoke very well, but it's a pity that I'm a little stupid and can't understand..."

"But but, I can really feel that Aisen is very knowledgeable, sometimes, I really can't believe that you are just a fourteen-year-old boy", Qin Ya quickly waved her hand and smiled.

"Of course, I'm a genius, I can naturally understand this kind of thing after reading it once, besides, I'm not fourteen years old, according to the earth calendar plus the time spent here, I should be nineteen years old", under Qin Ya's praise, Aisen raised his head a little proudly, and smiled secretly in his heart.

But although Qinya's praise made Aisen very happy, in the end, Aisen still didn't understand why Qinya was laughing, so he asked again, "But Sister Qinya, what does this have to do with you laughing?"

"Well, it really doesn't matter, it's just that when you talk about this knowledge, the excitement in your eyes is like a child meeting a favorite toy, so pure, so real, so I'm very happy for you", Qin Ya smiled as a matter of course, as if she thought her laughter was normal.

"Hey, hey, don't treat me like a child, I'm just interested in knowledge of the unknown," Eisen whispered in his heart, his eyes lowered.

In fact, Qinya is right, whenever Aisen encounters an unknown field of knowledge, he will be like a child who has encountered a novel toy, and he can't extricate himself from it, until he completely understands it, and he can't let go, but Aisen himself seems to have never discovered this.

"Ah, Xinxin should take a small bite when eating marshmallows, look at your mouth, they are all stained with marshmallows, what a waste."

Qin Ya didn't dwell on this problem, half squatted in front of Xinxin, and carefully wiped the marshmallow boy on the corner of Xinxin's mouth with the handkerchief she carried.

After making sure that there was no marshmallow residue at the corner of Xinxin's mouth again, Qin Ya nodded with satisfaction, then turned her gaze to Aisen again, and chuckled, "I'm sorry, Aisen, did you have anything to say just now?"

"No, Sister Qinya, let's continue to taste the snack bar on this food street", Aisen shook his head and said with a smile, unconsciously, he also grew a lot in the words of others, and recognized himself a lot.

"Yes!"

Qin Ya nodded, smiled, and then traveled with Aisen to this street full of the smell of food again, and her heart was as sweet as a five-colored marshmallow.

"Sister Qinya, come on, there are a lot of delicious delicacies here, let's try them together!", not far away, Han Yan waved his hand to greet Qinya, his face was full of excitement.

Facing Han Yan's invitation, Qin Ya's eyes immediately flashed with hesitation, and then looked at Xinxin who was eating marshmallows beside her.

Seeing the hesitation in Qin Ya's eyes, Ai Sen also knew that Qin Ya was worried about Xin Xin alone, so he smiled, "You don't have to worry about Sister Qin Ya, I will take care of Xin Xin, you can enjoy the snack bar of this food street with Han Yan, you can't let this summer festival leave regrets..."

"Thank you Aisen, Shin Shin will ask you to take care of it."

Qin Ya smiled gratefully, said softly, and then met Han Yan's call and ran towards her, tasting all kinds of food on the street like a good sister.

"Seriously, sometimes I really think that Sister Qin Ya and Han Yan are more like sisters...", looking at Qin Ya who was laughing and laughing not far away, Han Yan and the two, Aisen couldn't help but show a smile, and whispered in his heart

Time passed quickly, and before I knew it, I was elegant, and Han Yan also played for a long time, and at this time, the three of them were also a little tired, so they found a stone platform at random and sat down to rest.