Detective Conan was a Japanese mystery anime. Every episode involved a lot of interesting knowledge. The following is some knowledge that might make people feel terrible: Detective Conan had many stories about Japanese history and culture, such as traditional Japanese costumes and props. There was also a lot of scientific knowledge in Detective Conan, such as physics, chemistry, biology, etc., especially about anesthetics and drug experiments mentioned in Conan. The characters in Detective Conan often used various detective techniques and skills, such as the anesthetic needles used in Detective Conan and the private detective skills used by primary school students. There were also many discussions about Japanese social problems in Four Detective Conan, such as domestic violence, the gap between the rich and the poor, and social injustice. It should be noted that although Detective Conan has some terrible knowledge, it does not mean that it will threaten people's lives and safety.