1. The mining efficiency of open-pit mines has improved, and the efficiency of deep open-pit mines will be further improved.
2. Open-pit mines can mine iron ore, coal, silver ore, gold sand, stone, jade, salt, gemstones, and obsidian.
3. The output of open pit mines is increased to 30K, and the output of deep open pit mines is unlimited.
4. Open pit mines and deep open pit mines can be dismantled
Note: Only modify open pit mines and deep open pit mines