Father, who is both a heir and a descendant, is still biased; the bound system has gone berserk.

Lady Xuanwu stared blankly at Ying Yufu.

Marquis Xuanwu, who was standing next to him, was also stunned.

"Nonsense! What nonsense are you spouting? How could I not be my parents' biological child? Don't even think about harming me!"

Zhong Xingchu finally realized he was afraid. His eyes were filled with deep fear, and cold sweat finally broke out on his forehead.

Even when he saw those dozens of corpses being carried here, he had never been so afraid. He was certain that he was the only son of the Marquis of Xuanwu's family, and that the Marquis of Xuanwu's family would definitely protect him.

But what if he isn't?

Zhong Xingchu simply couldn't believe it.

The old Marquis Xuan strode up to Ying Yufu's face, his gaze piercing, his eyes like a hawk's, and he said in a trembling voice, "Young lady... no, Princess Anguo, is what you're saying true? This beast is truly not of the Zhong family bloodline?"

At this moment, the old Marquis Xuanwu desperately hoped that this beastly creature was not his grandson.

With such a grandson, he would have no face to face His Majesty and the families of those corpses while alive, and even less face to face the late Emperor and the victims themselves after death.

"Grandfather, don't believe her. How could I not be your grandson? You watched me grow up since I was a child, Grandfather..."

The old Marquis Xuanwu ignored him, his eyes fixed on Ying Yufu, not daring to miss a single detail in her gaze.

Ying Yufu's gaze was clear and firm. She said, "Old Marquis, Zhong Xingchu is definitely not of the Zhong family bloodline. Back then, your own grandson was predicted by the abbot of Baiyu Temple to be a future general, but look at him, where is there any trace of a future general in Zhong Xingchu?"

This is indeed the case.

At this moment, both the old Marquis Xuanwu and the Marquis Xuanwu and his wife showed hesitation.

Lady Xuanwu stood up and gave Ying Yufu a slight bow.

Her eyes were red, but her tone was calm and gentle.

"Princess Anguo, to be honest, Xingchu has never been able to learn anything, whether it's literature or martial arts, since he was a child."

We once doubted whether he was our biological child, but how could he not be?

We would never even imagine having our child switched.

So much so that we even doubted whether the abbot of Baiyu Temple's predictions were accurate.

But now, Princess Anguo actually says that he is not our biological son, so we really believe that he is not.

After all, from childhood to adulthood, he has never resembled us in any way.

Whether it's appearance, personality, or character, their morals are absolutely terrible. In the past, we just didn't dare to think about it, but now, we have no choice but to think about it.

Princess Anguo, do you have any evidence to prove his identity?

And then there's the question: is our biological son still alive?

Why was your child switched back then?

Ying Yufu looked at her reassuringly and said, "Madam, please allow me to explain slowly."

"Whether he's your biological son or not, all you need to know is..."

"Host, you're not going to suggest a blood test to prove kinship, are you?" Xiao Dian's voice suddenly rang out.

Ying Yufu was taken aback: [Yes, a blood test for kinship, Xiao Dian, is there a problem?]

[I knew it, host. Blood kinship testing is completely inaccurate. I can't explain it in too complicated a way, but simply put, people with the same blood type will have their blood mixed.]

However, not all people with the same blood type are related by blood.

Ying Yufu's pupils dilated.

Is it really inaccurate?

The Crown Prince, who heard the same thing, remained silent.

The prince's lips twitched. If that's the case, then how many people have raised other people's children throughout history?

I heard that a few years ago, a blood test for kinship occurred in the home of a high-ranking official.

The people from the Xuanwu Marquis's residence were all staring intently at her, making her feel like she had no way to hide her true feelings.

Ying Yufu was getting anxious. "Xiao Dian, is there any other way?"

[Host, the parentage potion costs 30 points per bottle. Simply add a few drops of blood from the two individuals to be tested to the potion, and it will reveal whether they are biologically related. Purchase?]

"Buy it!" Ying Yufu said without hesitation.

Immediately, the system deducted 30 points, and a bottle of blue potion appeared in her space.

She then said to Lady Xuanwu, "Madam, the traditional blood test for kinship cannot truly verify whether someone is biologically related to another. I have a bottle of medicine here specifically for paternity testing."

Simply drop a drop of your blood into it to verify.

"Absurd, utterly absurd! Listen to what she's saying, it's unheard of! Grandfather, Father, Mother, you mustn't believe her!"

Zhong Xingchu shouted anxiously.

A glint of light flashed in the old Marquis of Weiyuan's eyes. "Princess Anguo, I will believe you just because you said that blood tests are inaccurate."

He seemed to be lost in some kind of memory: "Forty years ago, I personally witnessed the blood of two people who were not related by blood mixing in clear water."

I was shocked at the time, so I tried with different people one after another. The final conclusion was that some people's blood could be mixed, while others could not.

But this is enough to prove that blood kinship testing is inaccurate.

His gaze shifted to the medicine in Ying Yufu's hand, and a glint of light flashed in his eyes once again.

Just now, the green potion that the prince gave him made him feel better and better. He originally thought he would not live much longer, but after drinking the potion, he was full of vitality again.

He noticed that the medicine that had saved him was also given to the Crown Prince by Princess Anguo.

He now trusts the fertility potion in Princess Anguo's hand.

"Princess Anguo, I believe in you."

he said.

Ying Yufu's eyes lit up; she hadn't expected that this old Marquis was truly knowledgeable.

But to make it more convincing, she said, "My lord, my lord, my lady, to convince everyone, we can try it on a few more people first."

"Alright!" The old Marquis Xuanwu nodded in agreement.

"Alright." Marquis Xuanwu and his wife also looked resolute.

Only Zhong Xingchu's eyes showed a deeper fear.

Ying Yufu uncorked the bottle, looked at everyone, and said, "Who wants to try?"

"I am willing to give it a try." Old Liu, who had lost his daughter, was the first to step forward.

Ying Yufu glanced at him and said, "Alright. Who's willing to try for the second person?"

"I am willing to give it a try," Old Ding stepped forward.

He and Lao Liu were colleagues who had gone through thick and thin together; he was willing to risk his life for something as trivial as a drop of blood.

Ying Yufu glanced at the two of them and nodded, saying, "Alright, then each of you take a drop of blood and add it to this medicine. Even if you are not related by blood, this medicine will remain effective indefinitely."

The two men moved quickly, immediately drawing their swords from their waists, cutting their fingers, and dripping blood into their wounds.

Ying Yufu, who had just taken out her silver needles, was speechless.

She silently looked into the bottle and said, "If there is a parent-child relationship, the potion will turn red. If not, the potion will remain unchanged. Here, 'parent-child relationship' refers to father and son, mother and son, and even grandparents will not change color."

Upon hearing this, everyone's eyes widened with curiosity as they stared at the medicine bottle in Ying Yufu's hand.