???

Wang Dongxue said gratefully: "That's so thank you, Master!"

Ye Chen smiled indifferently: "It's okay, don't be so polite to me."

When he said this, Ye Chen wanted her to be busy first, so that he would not delay her from doing things at home. But at this moment, he heard Wang Dongxue's phone call, and suddenly a man's voice came from: "Ms. Wang, we found the source of the poison in your father!"

At this time, Wang Dongxue was still holding her cell phone, but when she heard this, she had completely forgotten that she was still talking to Ye Chen. She blurted out and asked nervously: "Captain Sun, where is the source of the poisoning you mentioned?!"

Sun Wenbin, wearing latex gloves, held a heavy book and said, "Our criminal investigators found that every piece of paper in this book contains mercury dichloride!"

"Also, we found that the flipped traces of this book are very new and there are many. I guess your father has read this book more frequently in recent times."

"When he read this book, his hands would be stained with the mercury dichloride applied on it. A small part of it would be absorbed directly through the skin, and a part might be eaten into his stomach when he was taking the food."

"And, when the previous generation read books, they often had a bad habit. When turning pages, they liked to lick their fingers with their tongues. I don't know if your father has such a habit?"

Wang Dongxue nodded gently and said, "My father does have this habit of reading books. I have said that it is unhygienic to read books, but their generation has long been used to it, so this problem has never been changed."

Sun Wenbin nodded and said, "That's right. I think the excessive amount of mercury dichloride in your father's body comes from this book!"

Wang Dongxue was immediately struck by lightning and blurted out: "Captain Sun, is it because someone deliberately poisoned my dad?!"

Sun Wenbin nodded and said, "From the application process in the book, mercury dichloride is in an extremely fine powder form and is completely spread on paper. This makes it almost colorless and odorless, and it is difficult to identify it. Therefore, it can be speculated that this is definitely artificial, and the other party is very cautious and has a strong sense of anti-reconnaissance!"

Wang Dongxue said angrily: "My father has taught and educated all his life and has never offended anyone. Who would have done such a cruel move on him!"

Sun Wenbin hurriedly asked her: "Do you know how this book came about?"

Wang Dongxue nodded quickly and said, "This book was sent by a courier my father received before the New Year."

Sun Wenbin was overjoyed and asked, "Who is the sender?!"

Wang Dongxue shook her head and said, "At that time, there was no sender information in the express delivery, but just brought a note inside. The person who wrote the note claimed to be a student my father had taught before. He said that he accidentally discovered this book abroad and knew that my father would like it, so he bought it and gave it to him."

Sun Wenbin frowned and asked, "Did you have no sender information? Didn't you doubt it at that time?"

Wang Dongxue sighed and said with great remorse: "My father has been teaching and educating for half his life, and he has taught countless students. Many students often mail him some books, including books they published themselves, or some lonely books they found in foreign countries. My father also often mails some books he has read to his students."

"You also know that the gifts that academics often give to each other are books, so we really didn't take it too seriously at that time."

Sun Wenbin frowned and asked, "Is the express packaging still there?"

Wang Dongxue shook her head: "My mother cleans those things once a day."

Sun Wenbin asked again: "What kind of express delivery company was it at that time? Do you still remember it?"

Wang Dongxue thought for a while and said, "It seems to be a postal international express delivery, sent from Greece."

When Sun Wenbin heard this, he sighed and said, "It seems that there is no clue found."

Wang Dongxue hurriedly asked: "Why?"

Sun Wenbin explained: "If it was sent from Greece, it would be found by the customs when entering the customs. The customs inspection methods are much stricter than ours. Many people who are clever and want to cross-border drug trafficking through similar methods will be found by the customs. Therefore, such books that are smeared with poison will not be delivered to your house."
Chapter completed!