Final Chapter of the Extraordinary Records of the Civil Investigation Bureau.

Summary

Su Yu and Hou Mo Hua discover a hidden passage using a unique tracking method with a severed hand and smoke. They navigate through a circular path with hidden mechanisms, eventually finding a concealed staircase. Descending carefully, they reach an underground location that Su Yu identifies as the capital of the legendary Qi An Kingdom, which he previously believed was a fictional place. Ma Jian Guo's ability to locate this underground kingdom surprises and intrigues Su Yu.

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