After a night of interrogation, after Pei Yao went down, he was still told by Hong Zheng that nothing was found.

The source of this poison seems to be hidden in some place that will never be discovered, no matter how much you ask or investigate, you can't find any clues.

But since someone poisoned it, there must be a problem.

Recalling the illness of the fifth prince, Pei Yao found that after the child went to the school for a period of time, he would always feel unwell, but during the time he stayed in Fengxuan Palace, he was not affected.

It's just that there are desks, chairs, benches, and books in the school, what can be abnormal?

Guo Yuan checked it and found nothing wrong.

Pei Yao was also upset, and got up and went to Fengxuan Palace to see the five princes.

At that time, the queen had woken up from a coma, and when Pei Yao came, she was crying silently, and on the table beside her was all the schoolwork that the fifth prince had written since he went to school.

The fifth prince is indeed very diligent and smart, no worse than the fourth prince, such a young child, is very attentive in learning, since the beginning of enlightenment, he has never stopped holding the pen every day.

After school, the first thing I did when I came back was to complete the homework assigned by the master, that is, I took a break from school during the period of recuperation, and I really rested for a while.

At this time, Pei Yao looked at the thick stack of papers in front of the queen, and he was also moved, picking up a stack and looking at it.

But looking at this, Pei Yao's face was wrong, as if he had found some clues.

But he wasn't sure, so he took out one of the stacks and compared them repeatedly.

At this time, the queen also discovered Pei Yao's abnormal behavior and couldn't help asking.

"Your Majesty, what's wrong with you?"

"Look at it, is there anything wrong with the handwriting that Xu'er wrote during this time."

Pei Yao spread out the paper in his hand and asked the queen to compare.

The queen read it and shook her head, "The concubine didn't see anything abnormal, but this handwriting, the more you write, the better, what did the emperor find?" ”

"No, there's something wrong with this ink." Pei Yao frowned, his eyes sharpened, "I remember that the ink used by Xu'er is the Hui ink that I rewarded him, the Hui ink has the characteristics of licking the pen without glue, lasting for a long time, strong and bright, falling paper like lacquer and not fainting into the paper, you see that he started from these few pieces of paper, although the handwriting is better, but the ink seems to have a problem." ”

Empress Su Ri's attention is on the progress of her son's calligraphy, and the quality of schoolwork, in these things, the four treasures of the study are the best, who will pay attention to these.

However, as Pei Yao said this, the queen took a closer look and found something wrong.

Especially after the five princes cultivated for a month, they went to the school again, and the changes in the ink on the few pieces of paper written during this time were much more obvious than before.

"Minsi, go and bring the four treasures of the fifth prince's study, go quickly!"

In the past, when I checked the things around the five princes, they were all in daily necessities and food, so who would have thought that the things used for this study would be manipulated.

Hui ink is fragrant, the ink color is even richer, mixed with something, it can't be seen, these five princes use it every day, smell it every day, how can he stand it?

After such a long time, it will poison the hair and skin body.

Min Si didn't dare to delay, and quickly found out the things of the five princes.

At this time, Hong Zheng was also under Pei Yao's instructions to go and invite Guo Yuan to come over.

After Guo Yuanju carefully examined these things, he immediately took the inkstone.

"Your Majesty, the queen mother, there is a problem with this, the inkstone has been soaked in poison for a long time, and when the ink is studied, it will naturally penetrate into the ink, and the five princes will use this inkstone every day, and they will naturally be infected with the poison every day!"

When she said this, the queen took the inkstone, and she naturally didn't see anything wrong.

Although this inkstone is a good thing, it is not a problem to make it exactly the same, after all, when every imperial heir in the palace begins to study, Pei Yao will reward the child with a set of such four treasures of the study as encouragement.

From the eldest prince to the fifth prince.

And after these things are brought to the school, they are not put away all the time.

During the lunch break at noon, the children are in the school, going to the special room for rest, eating, napping, these things are naturally still on the desk, waiting for the afternoon to use, and the servants who are waiting with them are just helping to wash the brush.

So if you want to change the inkstone of the five princes, there is a chance.

"Check, check for me, who did it with these things!"

Pei Yao was furious and immediately asked Hong Zheng to go to the school to check.

This check really has an eyebrow.

In October of the previous year, there was a eunuch and a palace maid who went out of the palace, and the eunuch did not want to die in the palace because he had a contagious disease, so he took out his savings, bought the steward, and let him go, just as if he was dead.

The other palace maid happened to be twenty-five years old and left the palace.

Just these two people, naturally they have to check.

But I didn't expect that when I checked the information left in the palace, no one was there.

The eunuch said that after coming back and staying for a few days, others knew that he was sick and disgusted, so he moved away, not knowing where he went.

And the palace maid said that after coming out, she followed her father and mother back to her hometown, but no one knew where their hometown was, only that it was in the south.

As a result, the clues outside the palace have been cut off since then.

Now you can't find a direct witness, so you can only check it indirectly.

When these two people were still in the palace, they continued to investigate who they had contact with and who they had a good relationship with.

But I didn't expect it to be difficult to check.

Whether it was the eunuch or the palace maid, the two were very withdrawn and had no friends in the palace.

Originally, things in the school were very easy, sweeping the floor every day, wiping the table, and trimming the green plants in the yard, plus the princes and princesses came to class, and they all brought people to serve themselves, and they didn't need others, so there were not many palace people on errands in the school.

There are few people, and there are not many things, after doing work every day, I like to get together lively, and I don't like to rest by myself, but no one pays much attention.

But the more difficult it is to investigate, the more angry Pei Yao becomes.

Who is it that is so deeply hidden.

The health of the fifth prince is not getting better, but there are other children in the palace.

Keeping such a tumor in the palace, and then attacking other children in the future, it will affect more people.

But if it is done, there will definitely be clues, so the portrait of the eunuch and the palace maid was taken outside the palace and someone was sent to track it down.

In the palace, Pei Yao also had suspicions in his heart.

I arranged someone to investigate it secretly.

Not only Pei Yao, but also the queen hates the person behind it in her heart.

Now she looks at everyone like a murderer, whether it is Fang Yu or Concubine Wan, or even Concubine Jin and Concubine Song, as long as she has a son, she is not at ease.

It was also at this time that the queen decided to muddy the waters of the harem.

When people are irrational because of resentment, they will be like this, I am not happy, then everyone should not be happy.

So it didn't take long for Concubine Wan to be assassinated and the news that she couldn't have children exploded in the harem.