Su Yuqing was scanning a stone mortar when she suddenly called out, "There is metal residue in the grinding trough!" Spectral analysis revealed the presence of tungsten, a material that was not widely used until after the Industrial Revolution.
"The tungsten vein must be near the abandoned mine shaft!" Mu Feng stood up abruptly. "The Lu Clan artisans may have already been..."
Outside the window came the screech of a car braking sharply, and three dark figures were creeping toward the inn's backyard.
Chapter 77