Chapter 553: Chapter 506: Direction

The Huang Li Drug Trafficking Gang's basement renovation plan was extremely immense and luxurious.

With a surface area of 2000 square meters and a height of about ten meters, it was equivalent to an underground factory. The space they currently used for production was less than one-tenth of the total area. The entire underground space still had great potential for expansion.

Jiang Yuan, following the production line, quickly found several more fingerprints and slowly accumulated some insights. More precisely, it was a clash between the habits of the Criminal Science Center's crime scene investigators and trace evidence collectors, and the drug trafficking gang members.

The crime scene investigators and trace evidence collectors of the Criminal Science Center used the thought patterns of normal people to analyze and conduct their surveys.

But you wouldn't guess the mindset of the drug dealers—who else would truly leave fingerprints on a wall five meters high?