In the original novel Detective Conan, Xiaolan often suspects that Conan is Shinichi, because she and Shinichi grew up together and Xiaolan is familiar with Shinichi's habits. Judging from Conan's speaking habits and daily actions, Xiaolan has the illusion that Conan is a newcomer. Why did Xiaolan seldom suspect Conan was a newcomer in the later period? This is mainly because of the camouflage and concealment of various characters.

Xiaolan is a high school student. She received a modern science education, not a science fiction education. How can people become smaller? People can't get smaller. Therefore, even if she suspects, the deep-rooted concept makes her have to consider the possibility a lot. Besides, Conan's brain really turns fast. When Xiaolan doubts, let Agasa Hiroshi talk to Xiaolan with the voice of a voice changer, and hang around Xiaolan at the same time. How can a person be busy? Xiaolan's doubts were dispelled.

When Xiaolan once again suspected that Conan was Shinichi, Shinichi's mother Vivian Kudo directly denied it. Conan is a distant relative of Kudo's family. Xiaolan thinks that even her mother denies that Conan is a new one, so Conan is definitely not a new one. I think I have this idea because I think too much. Later, for the third time, Xiaolan suspected that Conan was a newcomer. Xiao Ai directly put on a mask and pretended to be sick Conan, while Conan ate the experimental antidote given by Xiao Ai and temporarily changed back to a new one. Xinyi and Conan appeared beside Xiaolan at the same time. How can Xiaolan continue to doubt?

Just three, three is a reassuring number. Since all three doubts have been hit by reality, Xiaolan has no need to continue to doubt. This is also the reason why Xiaolan rarely doubted Conan's identity in his later period.