Joining the Police Force, Solving a Major Dismemberment Case from the Beginning.

Summary

Chengzi receives an iron box from Lao Zhang, becoming completely mesmerized by it. During their journey, he sits silently in the passenger seat, obsessively examining the box. Han Xu, Li Le, and Lao Zhang discuss the mysterious object, which appears to be a complex mechanical lock left by Chu Yun Tai. The tiny keyhole is unusually small, making it seem nearly impossible to open. Han Xu explains the historical significance of locks, describing them as ancient restraining devices with intricate designs and craftsmanship, suggesting this particular item might hold significant historical or personal importance.

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