After listening to Yu Jin's analysis, everyone was immediately frightened.

It was beyond anyone's expectation that the murderer was so meticulous and bold.

This is a royal family banquet, and the most distinguished people in the world are here. Who on earth is so bold?

Prince Yan said that the real culprit was among those people in the palace... Thinking of this, many people couldn't help but shudder.

There seemed to be too many ice basins in the main hall.

Yu Zhenchong clasped his fists at Emperor Jingming and said, "Father, there are too many people in the palace and it's a mess. We should start with this maid and first determine whether she was instructed to poison or was careless and someone took advantage of her."

Emperor Jingming nodded and said calmly, "Pan Hai, pry open the mouth of this palace maid for me."

Pan Hai agreed immediately, and with a wave of his hand, two eunuchs came up and dragged the palace maid away.

Both eunuchs belonged to the Dongchang.

Everyone's face turned pale, and they felt that the atmosphere in the hall was heavy and depressing, and it was difficult to breathe.

Yu Jin looked around and said loudly, "Before we receive any news, please do not move around freely, and do not let anyone leave the hall."

The atmosphere became increasingly heavy.

After a long wait, Pan Hai finally came back: "Your Majesty, after interrogation, the maidservant was indeed unaware of the incident."

The palace maid never appeared again.

Of course, interrogation cannot be done with just verbal questioning; torture must be used. People who have been tortured are described as terrifying, and without special instructions, they cannot be brought in to disturb the nobles.

Emperor Jingming looked at Yu Jin.

With so many people in the palace, and excluding the possibility that the palace maid was instructed by someone, trying to find the poisoner would be like looking for a needle in a haystack. He was very curious about what other options his son had.

Yu Jin looked at the crowd calmly and said, "Today is a family dinner. Although there are no screens to separate male and female guests, the princesses are all girls. If a man walked by, it would definitely attract attention. So I think we can rule out the possibility that the murderer is a man. Do you have any opinions?"

Everyone nodded secretly.

When the banquet began, the seating was carefully arranged. The concubines had one table for the women, the princesses who had not yet been crowned had one table, the princesses who had been crowned had another table, and there were also the princesses, princesses, and so on.

Those walking around in this area were all palace maids, and there were no eunuchs.

In this case, King Yan's analysis makes perfect sense, and the murderer must be a woman without a doubt.

Seeing that everyone agreed with his words, Yu Jin glanced at the wine tables one by one and said slowly, "There are nine tables in total. If we want to find the murderer, the method just now is enough."

The method just now?

No one reacted for a moment.

Jiang Si looked at the man who was talking, with a soft look in her eyes.

A-Jian is like this. She seems uninhibited and does whatever she wants on weekdays, but she is always reliable when things really get tough.

Yu Jin's eyes flashed, and he and Jiang Si looked at each other for a moment, and then continued: "Starting from the first table, everyone just needs to recall who left their seats before the incident."

The first table was occupied by Consort Xian and others. One of the ladies immediately asked in embarrassment, "I was chatting with my sisters at the time, how could I have noticed someone leaving their seat?"

Yu Jin smiled and said, "That's easy. Your Majesty, you just need to recall whether anyone left at that time."

Everyone suddenly realized.

This method is indeed very good.

Attention is easily distracted in a lively occasion, and few people will pay attention to what the people at the table are doing all the time. It would be much easier if they just remembered what the people around them were doing.

This method has another advantage. Since everyone is sitting in a circle, each person is both on the right side of the person on the left and on the left side of the person on the right. Therefore, each person can be noticed by two people. In this way, even if one person does not notice, it will not be a big deal.

With Emperor Jingming present, dozens of concubines, no matter how reluctant they were, still cooperated with Yu Jin's recollections.

When it was Concubine Xian's turn to speak, she looked at Yu Jin deeply and said calmly, "I don't know what the two of you were doing at that time, because I was out at that time."

Everyone's expressions suddenly became subtle.

I really didn't expect that the first person to leave her seat at that time was actually the Prince of Yan's mother. Concubine Xian obviously knew that she couldn't escape after using the Prince of Yan's method, so she directly admitted it.

Yu Jin's expression did not change at all, and he asked calmly, "Where did the queen go at that time?"

"I'm going to change my clothes."

In this kind of situation, "changing clothes" is a euphemism, but in reality it means going to the toilet.

Yu Jin asked again: "The banquet just started, why does Your Majesty need to change clothes?"

When he asked this question, everyone's faces suddenly became strange and they exchanged glances with each other.

The Prince of Yan is truly upright. He is so aggressive and merciless even to his mother.

Some people are thinking: From this it seems that it is true that Prince Yan and Concubine Xian have a bad relationship.

Concubine Xian felt very embarrassed to be asked this question by her son in public.

This beast still has the nerve to ask!

Why did she go to the bathroom? It was because she was mad at that evil creature.

She watched coldly as the couple became increasingly angry, but she could not show any sign of anger. She could only drink tea to calm her temper. After drinking a bellyful of tea, her stomach became bloated, so of course she had to go to the toilet.

"I feel a little unwell." Concubine Xian's face was calm, and her tone was not angry at all. "My maids and the eunuchs serving in the dressing room can testify to this."

Concubine Xian's words were soon confirmed.

"Does Prince Yan have anything else to ask?" Concubine Xian asked calmly.

Yu Jin smiled with her white teeth: "No more. My son asked carefully because he didn't want others to misunderstand you. I believe you won't blame me, right?"

Before Concubine Xian could say anything, Emperor Jingming said, "Seventh Brother, please continue asking. Your mother is a reasonable person. How could she blame you?"

Concubine Xian smiled and echoed Emperor Jingming's words: "Your father is absolutely right. I certainly won't blame you."

"That's good." Yu Jin replied indifferently and began to inquire about the next table.

The second table was occupied by Princess Rongyang and other royal relatives of equal rank to Emperor Jingming. After the banquet began, Cui Mingyue, who was following Princess Rongyang, went to her seat.

There was also someone at this table who left before the incident, and that was Princess Rongyang.

Seeing everyone looking over, Princess Rongyang raised her eyebrows and said impatiently, "I was toasting my brother at the time."

Emperor Jingming nodded and said, "Yes, Rongyang was toasting me and the empress at that time."

The reason why he didn't say it in advance was because he understood that only by taking the lead in cooperating with the Seventh Prince would those royal relatives and nobles be obedient.

Princess Rongyang was cleared of suspicion and glanced at Heng Yu.

Yu Jin pretended not to notice and continued to question the next table.

It didn't take long before all the female guests at the eight tables were questioned, and the number of people who had left their seats at that time was also found out, and everyone could confirm what they were doing at that time.

For a while, the investigation seemed to be at a stalemate.

Princess Rongyang said indifferently, "Brother, I think the Prince of Yan's method is not feasible. We have asked so many people and made so much effort, but we still can't find out the reason."

Another old prince spoke up: "Prince Yan is still young after all. Your Majesty, you should order the three judicial officials to cooperate with the clan affairs office to conduct a thorough investigation."

Emperor Jingming looked at Yu Jin steadily and said slowly, "Seventh Brother, do you have any other ideas?"

Yu Jin smiled and said, "Father, there are actually some people who have not been found."