Zhu Yanyi thought about the current situation before speaking. "I will prepare some medicine later. We will perform the surgery tomorrow night."
"Why at night?" Yan Aohan asked curiously.
Zhu Yanyi did not feel annoyed by Yan Aohan’s question. She answered calmly, "Treating patients requires not only the right medicine but also the right time. For Zhang Haitao, we need to reconnect her tongue. The temperature is lower at night, and blood flow slows down. This state helps the cold iron fuse better. The high daytime temperature is not as effective."
Yan Aohan understood. "Alright. I will send security personnel tomorrow. They will guard the area strictly at night. Nothing will go wrong."
Zhu Yanyi nodded. Surgery required quiet, and this procedure allowed no errors. Having guards was ideal. "Then I leave tonight’s safety to you."
Yan Aohan smiled and nodded. It was a small matter, but anything involving Zhu Yanyi was a big matter.
The next day, Zhu Yanyi discussed medication with Yu Qingyun. Yu Qingyun’s experience gave her new ideas.
"Look, using this medicine stops bleeding quickly," Yu Qingyun said from the side.
Zhu Yanyi nodded. "I always knew poison has many uses. If used well, it works better than normal medicine. I didn’t expect poison could be used for external application too."
"This is my second senior brother’s specialty. I learned a few tricks from him. You know, in certain environments, poison is more available than medicine. We brothers each have strengths, but you, little junior sister, are versatile."
Zhu Yanyi felt a bit shy. "Third senior brother, your praise makes me embarrassed."
"I mainly flatter you because I heard you can get some Spirit Spring water. Please bring some to the front line for me," Yu Qingyun said with a grin. Zhu Yanyi finally understood her goal.
Zhu Yanyi laughed softly. "Okay. I will try to get some. I cannot promise much, but I will give you what I can."
"Having some is enough. Such good items are rare," Yu Qingyun said. He cared more about prevention. With Spirit Spring water, he could give soldiers more hope of survival. "By the way, is this Spirit Spring water really from the Vajra Vase? Have you analyzed its components?"
Zhu Yanyi tilted her head at Yu Qingyun. "I haven’t analyzed it, but Grandpa Yao had someone do it. The elements are complete. Together, they stimulate vitality and restore energy. However, you cannot replicate it. Some key elements are unknown." Zhu Yanyi remembered sending some Spirit Spring water to Grandpa Yao for analysis to show how hard it was to obtain.
Although the water she sent was diluted many times, the elements remained, just weaker.
"What a pity. If we could create this Spirit Spring water artificially," Yu Qingyun sighed. She had heard of its effects, but so far, only Zhu Yanyi could obtain it. Others truly could not.