Shi Nian said that instead of going directly to the farmer's market, he went to an electrical appliance store before heading towards the farmer's market.

Business was the best in the morning, and when Shi Nian rushed to the farmers' market, it was bustling with people. From time to time, I looked up and crossed the crowd to see the slogan hanging on the door sign.

By the time she found Cao Jian's shop, it was already half an hour later, Shi Nian stood not far from the stall and looked inside, the boss Cao Jian could feel just by looking at his appearance, he was a shrewd trader, commonly known as a profiteer.

She didn't rush in to ask, but just observed not far away, and found that although he had a shrewd face, he looked quite kind when he spoke and acted.

After the flow of people had shrunk slightly, Shi Nian walked in and walked around his not-so-small shop, focusing on the mushroom packaging.

"Boss, are these mushrooms freshly served every day?" Shi Nian asked, pointing to a bag full of white mushrooms.

"Look at what you said, we don't dare to let customers eat things that are not fresh! My mushrooms are usually delivered in the early morning, and they will be sold in the morning, so you can eat them with confidence to ensure that they are fresh!" Cao Jian followed the prestige, and saw that there was a slim girl standing there, so he replied with a smile.

"It's all the same day, so what if it can't be sold?" Shi Nian seemed to be a little girl who didn't know anything, and asked with curiosity on her face.

"Usually not, if it really can't be sold out, then at most it will be left for the next morning to dispose of. Although it was not as fresh as the day delivery, I stored it very well and basically made no difference. "Cao Jian is also very honest and answers all questions.

"Is this how all the stalls in the farmer's market operate?" Shi Nian asked casually.

"That's not it, everybody's like that, the entrance is very cautious. When it is fresh, it is easy to sell, and the rest of the lost money will be disposed of, and it will not be stored for too long, and we will also have trouble. Cao Jian nodded and smiled.

Soon, a new wave of guests came in, interrupting Shi Nian's questioning, but she only captured the information she wanted from the few words she had just spoken.

These dishes are stored for a day at most, and the restaurant at home usually delivers all the ingredients in the early hours of the morning. That is to say, their batch of poisonous mushrooms either had a problem with the new goods delivered on the same day, or they were mixed with poisonous mushrooms in the process of storage after being left for a day.

Shi Nian has not been idle in the past two days, as far as she knows, only her own school has food poisoning in their municipal area, so she has reason to suspect that this is not an accidental incident, but a man-made operation!

And the person who can do this must be very familiar with his stall and have a certain understanding of the ingredients. First of all, the biggest suspect is Cao Jian, although he is a partner with his own family, but it is the nature of businessmen to make profits, and he is likely to be bought by someone to do this hurtful thing.

But for him, this is tantamount to setting himself on fire, once discovered, he is not only discredited, it is very likely that he will also be imprisoned, which is too costly for him.

If she had a clear mind, she would definitely be able to calculate the account.