On the side, Conan and Haihara Ai were observing the surroundings carefully, trying to find some clues or hints, but unfortunately, no matter how they looked, they could not find any special traces.

"Strange..." Conan murmured: "If you can hear laughter, it means there is definitely a way to get into the tower..."

Hui Yuan Ai knocked on the tower: "With this thickness, unless the person happens to be standing on the top of the tower, there will be no sound inside.

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