The hardness of the blue stone was very high. Chiseling on the steel plate's surface sparked a bit, while also shattering some stone debris.
A shock ran through his hand, and seeing the slight indentation at the edge of the gap, Chen Zhou slightly adjusted the angle of the stone and continued pounding downwards.
The tip of the wedge-shaped stone soon became flat and blunt in such violent collisions, wearing away cleanly.
The damage to the gap at the edge of the safe door was slight but clearly deforming, with a trend of expanding to either side.
"Effective!"
With a joyful heart, Chen Zhou found a new wedge-shaped stone and continued striking.
The incessant "dang dang dang" sound of metal clashing filled the air. By the dying campfire, sparks flickered from time to time.
