The concubine is a man, and the illegitimate son of a divine physician has a spatial ability.

Suddenly realizing that it was getting late, Yin Zijing hurriedly said, "It's getting late, Zijing has to go back quickly. The roads are slippery in the snow, and it will be too late to see the road."

Sheng Muling nodded and said, "Alright, you can go back first. Come visit me when you have time." Yin Zijing stood up, bowed respectfully to Sheng Muling, and then left with A Tian and the others.

Granny Zhou draped a thick cloak over Yin Zijing's shoulders, and A-Tian carried Yin Zijing toward Qingya Xiaozhu...

Upon returning to the elegant cottage, Yin Zijing felt a tightness in her chest and quickly lay down to rest. Somewhat uncertainly, she asked, "Ruhe, Granny Zhou, did you feel any chest tightness while you were at the princess's residence?"

Ruhe and Granny Zhou quickly said, "There's nothing wrong! Miss, are you having your period? Are you feeling unwell? And then you were outside in the cold for a while, which is why you feel uncomfortable."

Then Granny Zhou continued, "Miss, did you think there was something wrong with the incense and pills just now?"

Yin Zijing nodded and said, "I'm going to the clinic tomorrow to have my third uncle take a good look at what these things are made of..."

Granny Zhou said anxiously, "Miss, you've started your period. The weather is too cold; it's not advisable for you to travel back and forth."

Yin Zijin waved her hand and said, "It's alright, my period is almost over."

The next morning, before dawn, Yin Zijing got up, tidied herself up, ate something, and then let A-Tian help her into the carriage. Inside, the charcoal fire was burning brightly, and hot tea was boiling on it. On the small table next to her were delicate snacks and fruits. Ruhe also came in. A-Tian drove the carriage outside, while Shen Lu secretly protected them. And so the four of them headed towards Yin Gui's clinic...

Ruhe helped Yin Zijin sit down and quickly wrapped a thick blanket around her, instructing her, "It's still early, Miss, rest a little longer. I'll call you when we arrive."

Yin Zijing nodded wearily, and drifted off to sleep again with the crowing of the rooster and the barking of the dog. The carriage moved slowly across the snow, the wheels crunching against the snow like a gentle lullaby, soothing Yin Zijing to sleep. Inside the carriage, the crackling of the burning charcoal fire contrasted sharply with the cold, snowy world outside, creating a warm and comfortable atmosphere.

When they arrived at Huirui Medical Clinic, it was already broad daylight. Yin Zijing got off the carriage and shivered from the freezing cold outside. She quickly asked A-Tian to help her into the clinic. Once inside, Yin Zijing went straight to Yin Gui's residence.

Yin Zijing took out the items and said somewhat anxiously, "Third Uncle, please take a look at these things and see if there are any problems? Zijing is not knowledgeable enough, so I will have to trouble you, Third Uncle."

Seeing Yin Zijing's serious expression, Yin Gui quickly took the item and said solemnly, "Okay, let me see."

Yin Gui took the items from Yin Zijin's hands and examined them carefully. After a quarter of an hour, Yin Gui frowned and slowly said, "Both of these medicines are fine! They are both fertility aids. It's just that these two medicines are from the same source, so why are they separated? One is made into pills, and the other into powder."

If you smell them closely, they smell similar, only one is stronger and more pungent, the other is milder. Zijing, you are…

Yin Zijing shook her head and said, "Zijing didn't know either. The pills were placed inside the gold bracelet, and the powder was burned and ignited..."

The two remained silent for a moment, the room completely still. Yin Gui frowned, deep in thought, and Yin Zijing dared not disturb him. After what seemed like an eternity, Yin Gui suddenly slammed his hand on the table and exclaimed excitedly, "Yes, metal! It's metal! A gold bracelet!"

Zi Jin and Zi Jin, when used separately, are both excellent fertility aids, but when combined, with the added effect of metal, they become a harmful poison.

The powdered medicine, when burned, had a pungent aroma, but once it dissipated, it became faint, just like the scent of the pills. Even if the imperial physician came, he wouldn't be able to detect anything wrong; he would simply think it was a good medicine for enhancing fertility and wouldn't say anything more.

Prolonged use of this medicine can lead to infertility. Even if a woman is pregnant, it can cause miscarriage. If a woman uses it during her menstrual period, it can cause menstrual irregularities…”

Upon hearing this, Ruhe anxiously called out, "Miss, you're on your period! Will touching it cause any problems?"

Yin Zijing's expression changed; she really wanted to sew Ruhe's mouth shut. Yin Gui quickly put the medicine away, nagging, "Zijing, where did this medicine come from? Don't touch it anymore. Let me check your pulse?"

Yin Gui took her pulse and examined her carefully, saying, "Zijin, there's nothing seriously wrong. But you must never touch that medicine again. Your body is weak and has special characteristics. Forcibly reversing it has already disrupted your yin and yang balance. You must never touch that kind of filthy thing again, lest you endanger your life."