Early the next morning, Yi Shangyun and her servant set off for Baicaotang in the city. The Yi residence was located in the east of the city. Yi Shangyun looked refreshingly beautiful in a light yellow dress, with striking phoenix eyes. Unfortunately, because the chip system upgrade was not yet complete, the herbs she found could only be stored in the system and could not yet be used to detoxify herself. She still wore a white veil to cover her face.

Leaving the main gate of the Yi Mansion and turning west, you soon reach the bustling city center. The Mid-Autumn Festival is just around the corner, and the streets are already teeming with people. In ancient times, the Mid-Autumn Festival was a time for moon worship, moon gazing, lantern appreciation, and riddle-solving – a vibrant and lively affair. Some customs are more meaningful the more primitive they are.

The capital's markets were indeed much more bustling than usual. The master and servant were like birds that had been caged for a long time and hadn't been let out to roam freely, hopping and strolling around...

"Miss, look at these mandarin duck lanterns, they're a pair, aren't they beautiful?" Yan'er held them up with both hands, her eyebrows raised as she looked over.

"Miss, Miss, let's buy some candied hawthorns! This place has the best candied hawthorns, they're so sweet, okay?" Yan'er said happily, shaking Yi Shangyun's arm.

"It looks like someone has fainted, let's go check it out!" someone exclaimed beside him. Yi Shangyun looked over, then glanced at Yan'er, and understood, they went to check it out together.

"Grandma, Grandma, what's wrong? Wake up, Grandma..." A little girl, about five or six years old and dressed in tattered clothes, was shaking an old woman lying on the side of the street with her two withered little hands caused by long-term malnutrition, and crying sadly.

The old woman lay motionless on the ground with blood trickling from the corner of her mouth, seemingly unconscious. A group of people surrounded her, pointing and whispering, but it was impossible to hear what they were saying.

Upon seeing this, Yi Shangyun immediately bent down and knelt on one knee, took the old woman's wrist, and carefully took her pulse. Yan'er gently picked up the little girl, wiping away her tears while comforting her, "Little sister, be good, don't cry. My young lady will help you, don't worry."

Gu poison? She was actually poisoned by Gu? How could anyone poison an old woman like that?

Take a hundred insects and put them into a jar. After a year, open the jar. One insect will surely devour all the others. This is called Gu. There are many kinds of Gu poison, which are extremely cruel. Judging from the current symptoms, the person has just been poisoned.

Yi Shangyun immediately took out a delicate little medicine pouch from her sleeve, still embroidered with the character "Yun". She took out silver needles and pressed them against the old woman's chest, applying acupuncture for a while. Then she removed the old woman's shoes and socks and continued applying acupuncture to the tip of her little toe. Suddenly, a food-like substance began to seep out. It seemed the poison had been ingested through food.

Just then, the old woman slowly opened her eyes.

"Grandma, Grandma!" The little girl's eyes were fixed on her grandmother and never left her. When she saw her grandmother's eyes open, she broke free from Yan'er's hand and ran towards her grandmother.

At this moment, a larger than usual luxurious carriage driven by four horses sped past from behind the crowd in the middle of the road. Inside the carriage sat His Highness Prince Xuanyuan Han, the most powerful and noble prince of the Western Qin Kingdom.

Seeing the crowd, he peered through the car window at the scene outside, his gaze finally settling on Yi Shangyun, who was veiled. He frowned, sensing a vague familiarity, but only for a moment before quickly withdrawing his naturally cold and handsome face and sitting back down. His eyes were slightly closed, as if he were resting.

Seeing this, his deputy general Cheng Liang also glanced curiously in the direction of Xuan Yuanhan's gaze, but did not find anything special. He naturally had no idea what had happened that night.

"Grandma, are you feeling better?" Yi Shangyun asked as she finished sewing.

"Young lady, I'm much better now, thank you so much! Ling'er, quickly kowtow to your benefactor, please!" The old woman hurriedly sat up and grabbed the little girl's arm, gesturing for her to kneel down. Yi Shangyun quickly reached out to stop her, saying:

“Grandma, there’s no need for this. You’re not fully recovered and need to rest. But why were you poisoned? And why are you and your grandson now homeless?”

At this moment, the old woman pulled up her sleeves and choked with sobs, saying, "Young lady, you don't know, my son went to fight on the battlefield in the Northern Lie Kingdom and hasn't returned for many years. My daughter-in-law went to the General's Mansion a few days ago to inquire about him, but she too never returned. I was afraid that villains would frame my granddaughter, so I fled here with her. I heard that His Highness Prince Qin in the east of the city loves his people like his own children, so I wanted to go to Prince Qin's Mansion to seek justice for my poor son and daughter-in-law. I didn't expect to eat the food given to me by a villain, which led to this situation, and I almost lost my life. I don't care if I die, but I pity my poor five-year-old granddaughter who will be left all alone."

"Young lady, you are kind-hearted. I have no way to repay you. Please accept my bow." As she spoke, the old woman kowtowed, but Yi Shangyun was faster and stopped her. Fortunately, she didn't kowtow, or she would have shortened her lifespan.

Just then, she suddenly remembered that although acupuncture had already detoxified the elderly woman, her body was already weak, and another dose of medicine would be needed to completely eliminate the poison. She looked up and saw that the crowd had completely surrounded them, and everyone applauded her good deed.

She immediately spotted a man in the crowd wearing a blue robe, holding a copper bell in one hand and the other behind his back, with a tan medicine bag slung over his shoulder. He was also raising his eyebrows as he watched everything unfolding before him.

Yi Shangyun looked him over and walked over, saying, "Sir, may I ask you for a Five-Poison Pill?"

"How do you know I would have this medicine, young lady?" the itinerant doctor asked, stroking his beard.

Yi Shangyun cast a smile and a firm look into his eyes and said, "Although this kind of poison is not common in the capital of Western Qin, you must have seen and heard a lot from your travels. I believe you are familiar with this poison and must have this Five Gu Pill."

The traveling doctor paused for a moment, a smirk playing on his lips. "This medicine costs 100 taels per dose. Do you still want it, young lady?"

"Yes, of course I want it, no matter how expensive it is. But I was in such a hurry when I left that I didn't bring much money. Later, sir, please come to my residence with me, and I'd like to invite you to have some tea, how about that?" Yi Shangyun said, smiling as she reached out her hands to take the medicine. But in her heart, she thought, "If my chip system upgrade is finished, will you trick me?"

Sure enough, the doctor took out a small white porcelain bottle from his medicine bag. Yi Shangyun took it, gently opened it, and poured one into his palm. It was a honey-refined pill the size of a small bean, exactly seven pills in total.

"Thank you for the medicine, sir." Yi Shangyun turned around and went back to the grandmother and granddaughter, handing the medicine to the old woman.

"Grandma, this pill can clear the remaining toxins from your body. Remember to take one before each meal for seven days to ensure your safety. The Prince Qin's mansion is not far ahead. I hope everything goes well for you." Yi Shangyun pointed to the magnificent and noble mansion not far to the east with one hand, and stroked the little girl's head with the other. Her pale yellow dress made her look even more beautiful and charming at this moment.

Suddenly, when she looked down, Yi Shangyun noticed a scratch on the little girl's wrist. The wound was broken and bleeding. Yi Shangyun took out a white silk handkerchief from her sleeve and quickly and carefully bandaged the little girl's wrist. She even tied a bow on it, which looked very pretty.

"What a pretty bow!" the little girl exclaimed excitedly as she looked at the delicate bandage.

Yi Shangyun looked at the little girl with loving eyes. Such a small child, so pitiful. "Yan'er, give the old lady the silver we have with us." Yan'er obeyed and handed over a bag of silver. The grandmother and granddaughter shed tears of gratitude once again, and then bid farewell and headed towards the Qin Prince's mansion that Yi Shangyun pointed out.

"Miss, it's 100 taels! How are we going to explain this to the master when we get back?" Yan'er asked worriedly as she leaned closer.

"Don't worry, I have my own way," Yi Shangyun said impatiently. She was wondering how such unorthodox witchcraft could exist in the capital. Witchcraft had always been strictly investigated and avoided in the Western Qin Kingdom, and it had even affected an old man. As Yi Shangyun pondered, her usually beautiful brows furrowed without her noticing...