Solving the Case is Slightly Bitter, My Sister is Super Sweet.

Summary

Summary: Lin Xuan investigates a building with hidden laboratory, discovering a clever concealment technique involving 3 meters of vertical space walled off on both sides. Through meticulous measurements and deduction, he realizes the laboratory is vertically hidden behind fake windows. When he attempts to break through these windows, gunfire erupts, confirming his suspicion about the secret location. His exceptional investigative skills and analytical thinking lead him to uncover the covert research facility that other investigators failed to detect.

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