1.China's Enforcement
Hubei Chongyang auctions confiscated cobblestones: Initial failures → third sale at $1.8/ton, reflecting volatile compliance costs.
2.Global Ethical Framework
International Gravel Association (IGA) releases first Ethical Cobblestone Sourcing Standard:
Repair 3㎡ riverbed per ton extracted (modeled on Guizhou's "extraction-restoration balance").
Child labor ban + mandatory anti-vibration footwear.