Mr. Hua nodded. As soon as she felt the effects, the health doctor supported her to the bathroom. Zhu Yanyi began to investigate the source of the poison.
"Sister, can you really find the source of this poison?" Zhu Zhibin asked. He watched Zhu Yanyi carefully check the kitchen, but found nothing.
Zhu Yanyi smiled and said, "Let's check first. If we have the heart, we will definitely find it. So don't worry."
Hearing Zhu Yanyi's words, Zhu Zhibin shrugged slightly. He was not worried at all. He also wanted to know what kind of poison was so hidden.
After leaving the kitchen, Zhu Yanyi checked the living room. Still no results. Then she walked into the study.
Mr. Hua's study was large. Bookshelves were filled with countless books. On the desk, there was a book with a bookmark inside.
The bookmark was an antique bamboo product. Zhu Yanyi walked over, gently picked up the book, and looked at the bamboo bookmark. It was worn, obviously used for a long time.
"Doumiao, has this bookmark existed for a long time?" Zhu Yanyi asked.
Hearing Zhu Yanyi's question, Zhu Zhibin came over to look at the bookmark. He nodded. "This bookmark was reportedly given by one of Teacher's old friends. It was a set of six back then. Teacher always used these bookmarks to read. What's wrong?"
Zhu Yanyi smiled faintly. "What's wrong? I'll do a small experiment for you, and you'll know."
Zhu Yanyi brought her medicine box, lit an alcohol lamp, and held the bookmark with tweezers. She slightly roasted it over the flame, then dropped an unknown solvent on it. Gradually, a black shadow appeared on the bookmark. Zhu Yanyi placed it in a bowl and poured some liquid in. The liquid instantly turned black.
"Is this poison?" Zhu Zhibin understood, even though he knew little about medicine.
Zhu Yanyi nodded slightly. "This is poison. You wouldn't expect it, right? But this person is quite thoughtful. They put the poison on this bookmark. Mr. Hua touches this bookmark every day when reading. The poison slowly seeps into her body."
"Sister, what poison is this?" Zhu Zhibin asked curiously.
"Bu Shi Du." Zhu Yanyi said.
"You said it's poison, why is it called 'not poison'?" Zhu Zhibin was confused.
Zhu Yanyi glanced at Zhu Zhibin. "I mean, the name of this poison is Bu Shi Du. 'Bu' for supplement, 'Shi' for time, 'Du' for ferry."
"(⊙o⊙)… This poison name is strange enough. Calling it 'not poison' sounds awkward." Zhu Zhibin's speechless expression amused Zhu Yanyi.
"Bu Shi Du actually means consuming a person's time, slowly熬 (simmering) them to death." Zhu Yanyi said directly. "This poison is quite sinister."
"No, we must tell Teacher about this later. Let Teacher find out who this person is." Zhu Zhibin was angry. He never thought someone would use such a vicious method.
Zhu Yanyi glanced at Zhu Zhibin. "Mr. Hua is lucky. At least although he is poisoned, I can still discover it. Some people are pitiful when poisoned. For example, someone puts poison on the back of a stamp. You know, the back of stamps becomes sticky with just a little water. Some people, seeking convenience, don't use water. They just lick it with saliva, and swallow the poison." Zhu Yanyi said, "Fortunately, Mr. Hua doesn't have this habit."
Zhu Zhibin was slightly stunned, then said, "My teacher doesn't have this habit. But after reading a page, he touches his tongue with his hand, then turns the page."
Zhu Yanyi was slightly stunned. She directly picked up the book, smelled it slightly, then found a medicine bottle in her box. She dipped a cotton swab in the solution inside and wiped it on the book. A red line appeared on the page.
"Sister, what is this?" Zhu Zhibin was surprised.
"Not a very skilled poisoning method, but a very skilled understanding method. This person must know Mr. Hua's daily habits very well." Zhu Yanyi answered irrelevantly. "I was originally curious. How could the poison on just the bookmark change after fifteen years? Now I understand. Someone occasionally puts poison on the books Mr. Hua likes."
Zhu Yanyi said to Zhu Zhibin, "Doumiao, which books does Teacher still like? Bring them over for me to check."
"Oh." After hearing this, Zhu Zhibin hurriedly looked around the study and brought over more than ten books.
Zhu Yanyi used the same method. Soon she discovered that all the books Mr. Hua liked were poisoned.
Zhu Yanyi sighed. "Doumiao, call the police. This matter is beyond our ability to handle."
Zhu Yanyi's profession is a doctor, not a police officer. Yan Aohan could investigate, but not openly. So they needed someone to investigate openly.
Before the attending doctor could speak, Yan Aohan said, "I'll call the police."
Yan Aohan went aside to make a call. Soon, people arrived. These were not ordinary police officers, but special ones. Actually, Yan Aohan didn't need to do this. If Zhu Zhibin called the police, the people coming wouldn't be ordinary officers either, given Mr. Hua's status.
Mr. Hua never expected that just going for a bath would lead to such a big discovery. Looking at these books, Mr. Hua sighed. "I actually like many books. I never thought someone would use these methods against me. But if the books are poisoned, what about future readers?"
Hearing this, Zhu Yanyi laughed. "Mr. Hua, rest assured. I'm not good at solving cases, but detoxification is no problem for me. Those who want to harm Mr. Hua wouldn't dare to destroy the books. So they can only use odor infection to make the books poisonous. I will use this method to fumigate the entire study and house with a detoxifying agent. I guarantee all poisons will be gone."
Mr. Hua was overjoyed. "In that case, I entrust this matter to the little divine doctor."
Zhu Yanyi nodded with a smile. She accepted the thanks and went to prepare. Soon, she prepared the fumigation tools. Although called fumigation, it was actually spraying. Zhu Yanyi used mist to spray water everywhere, inside and out, up and down. She didn't miss any spot. Of course, Yan Aohan and Zhu Zhibin helped, so it didn't feel slow.
After finishing the work and saying goodbye to go home, Zhu Yanyi couldn't help but sigh. "I wonder who Mr. Hua offended. Someone actually wants to kill an old man like her."