In recent days, the villagers had discovered light gray banded apatite ore deep in the mountain valley and, using iron pickaxes and other tools, had already dug up a considerable amount of apatite ore.
Xia Huai'an had some villagers stay behind to continue mining, while others joined Li Er and the other guards to transport the ore to the nearby Iron Smelting Camp, where they would refine phosphate fertilizer.
This was because the Iron Smelting Camp possessed more complete tools and equipment, and living conditions there were much more convenient.
Chapter 60