Seeing his state, Consort De personally poured him a cup of hot milk tea: "What happened?"

"The Emperor has ordered his son to thoroughly investigate the matter of the poisoning of the Princess Consort," Yinzhen said succinctly.

Consort De's first reaction was disbelief: "His Majesty is so busy with state affairs, how could he possibly care so much about a daughter-in-law?"

Yinzhen nodded: "I also find it strange. Besides, the word 'poisoning' comes from this."

Consort De thought for a moment and asked, "Tell me the truth, what is the reason that your wife's health has become so weak?"

Yinzhen took out a porcelain bottle from his bosom, which was half-filled with a greenish liquid: "This is it. It is used by the English royal family. It can help women maintain their figure. However, if a pregnant woman is exposed to it for a long time, she will sweat, become weak, unable to eat, need to change clothes more at night, and the child will be larger than usual. On the day of delivery, both mother and child will die. If the child is lucky enough to survive, the mother's body will have long since died."

Consort De examined the small porcelain bottle, her eyes suddenly widened, her hand wobbled, and she almost broke it.

"You must not get involved in this matter. Find a way to get out of it," Consort De said sternly.

Yinzhen retracted his expressionlessly: "It's too late. Father Emperor gave his son three days. If he can't find out, he will strip his son of his title of Beile."

Consort De moved her lips, as if she wanted to say something but then held back. Finally, she sighed and said, "You should be familiar with Empress Xiaochengren. The Hesheli clan, who caused such a stir in the city a while ago, is her cousin."

"Back then, Empress Xiaochengren died in childbirth, but she risked her life to give birth to the current crown prince."

The Empress Dowager's voice was barely audible: "Now that I think about it, her symptoms are exactly the same as your wife's. If there was a mastermind behind it all back then, she's done it again."

"Let's start by investigating the women," Consort De suggested. "Men generally wouldn't think of using such roundabout methods to harm people."

"Yinzhen, the death of Empress Xiaochengren has always been a knot in His Majesty's heart, something that cannot be touched or untied. Even if you find the real murderer, you will not gain any benefit."

"The only thing I can help you with is this part of the past; the rest is up to you." Consort De indicated that she was powerless to help and had no intention of getting involved.

Yinzhen cupped his hands and said, "Your son thanks Your Majesty for your guidance. Farewell."