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

Summary

The text describes an investigation led by Lin Xuan and Zhou Lie into Jiang An Xing's apartment. They meticulously search the premises, discovering a small, precisely drilled hole beneath the floorboards near the bed. This hidden passage suggests a method of secret communication with another party - likely the downstairs apartment's foreign international student tenant. The investigators uncover potential evidence of covert message transmission through unconventional means, highlighting the creative techniques used by those attempting to conceal their activities.

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