Sun Simiao was very clear about Li Shimin's situation. It was already very difficult for a woman to get pregnant at his age, and it would be very difficult for the child to be born smoothly.

Because he is no longer young, his essence and blood are in very poor condition, both in quantity and quality.

Even if the child is born despite the effort, they will most likely be weak and sickly.

This can be glimpsed from the upbringing of Li Shimin's last few children.

Li Shimin's eleventh son, Li Xiao, and twelfth son, Li Jian, both died young, neither reaching adulthood. Although his thirteenth and fourteenth sons did reach adulthood, they were frail and sickly from childhood, clearly not destined for longevity.

Furthermore, given that Li Shimin had recently been taking potent drugs to forcibly stimulate the production of his essence and blood, the quality of his children was predictably questionable.

Sun Simiao couldn't say these things. Firstly, he had to save face for Li Er, and secondly... he was merely a recluse, not a fool.

Although Li Er treated him with great courtesy, if he attacked him head-on, no matter how good-tempered Li Er was, he would still kill him!

In contrast, Li Jue had no such reservations and said everything that Sun Simiao was too embarrassed to say.

“Grandpa, since even my senior brother can’t do it, I advise you to give up.”

"What?"

Li Er had finally had an heir again after ten years, how could he give it up so easily?

"Explain yourself to me clearly, why should I give up!"

"Senior brother, you tell us?"

Upon hearing this, Sun Simiao shook his head and gestured to Li Jue not to say anything either.

“Junior brother, His Majesty suffered too much damage in his youth, it is really not advisable for him to have children…”

Li Shimin had heard this before, and now that Sun Simiao was using it as an excuse, he was immediately displeased.

"Master Sun, please explain yourself clearly!"

"I have been living a simple and frugal life these past few years, conserving my energy and rejuvenating my strength. Why can't I have an heir?"

"this……"

Sun Simiao looked troubled, and Li Jue took over the conversation and explained.

"Grandpa, please don't make things difficult for my senior brother. Don't you think about it? You're already so old, and you're still not learning anything good. You're following Master Yuchi and taking pills. How can the quality of your... well, that be good?"

"What is that?"

"It's your essence... your blood essence..."

Upon hearing this, Li Shimin's face darkened, and he kicked Li Jue.

"Shut up!"

"If you dare to spout nonsense again, I... I'll kick you to death!"

Li Jue was prepared when he finished speaking. Seeing that Li Er was indeed furious, he immediately jumped back and hid behind Sun Simiao.

Li Shimin looked at Sun Simiao standing in front of him, but in the end he couldn't bring himself to kick him, and reluctantly withdrew his foot.

Seeing this, Sun Simiao quickly tried to persuade him.

"Your Majesty, although my junior brother's words were a bit rough, the reasoning behind them is sound."

"If Your Majesty truly cultivates your mind and body, your health will naturally recover. But since you took potent drugs and forcibly conceived this child, it's difficult to guarantee his survival..."

Li Shimin gradually gave up after hearing this, but Xu Hui was extremely unwilling to give up.

The person she admired most in her life was Li Shimin, and she dreamed of having a son or daughter for him.

Now that even the renowned physician Sun Simiao had issued a death ultimatum, she was so frightened that she knelt down with a thud.

"Dr. Sun, please help me! You must help me save this child!"

"As long as this child can be saved, I'm willing to sacrifice my own life, sob sob sob..."

Xu Hui's words not only moved Sun Simiao, but also surprised Li Jue, who was watching the commotion from the sidelines.

In his view, Xu Hui was in the prime of her youth, how could she say such a thing?

Li Shimin was also stunned for a moment, then his heart and eyes were filled with emotion.

“Xu Hui…”

"Your Majesty, all I ever wanted in my life was to serve you wholeheartedly. I have no other desires. Now that I have finally conceived your child, if I cannot keep it, I... I..."

Li Shimin was deeply moved upon hearing this, and immediately embraced Xu Hui with tears in his eyes.

"Xu Hui!"

"I...I promise you, I will protect our child no matter what!"

"As long as you can successfully give birth to this child, I... I will appoint you as the head of the four imperial concubines!"

Although Li Shimin was almost blinded by love, he still retained some rationality and did not promise the position of empress to her.

For Xu Hui, however, the title of one of the Four Consorts was irrelevant; as long as he could stay by Li Shimin's side, he would be content.

"Li Jue, do you have any ideas at all?!"

"As long as you can protect the child in Xu Hui's womb, I... I will agree to any condition you set!"

Upon hearing this, Sun Simiao also looked at Li Jue, hoping that Li Jue could bring him a miracle.

"Uncle, as I said before, Sister Xu Hui's condition can only be treated with folic acid supplements!"

Upon hearing the word "folic acid," Sun Simiao immediately inquired about it.

"May I ask, junior brother, what is folic acid?"

"Brother Hui, folic acid is a substance that is widely found in green leafy plants and can greatly improve the health of the fetus."

"With current technology, it is difficult to extract this substance from plants, so it can only be obtained through dietary supplements."

"oh?"

"This thing has such effects?"

"Junior brother, tell your senior brother about the vegetables rich in this substance. Senior brother, try to see if you can extract it!"

Under Li Jue's tutelage, Sun Simiao had long since learned how to use various bottles and jars, as well as beakers, reagents, acids and alkalis.

Hearing Sun Simiao's eager expression, Li Jue immediately recited the names of plants rich in folic acid.

Seeing that it was just an ordinary vegetable, Sun Simiao immediately made a mental note of it, then inquired about the specific properties and functions of folic acid before hurrying off.

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