One is to increase production, and the other is to increase mining speed.
At level 60, the two left together.
Raiders of the Pocket is a cartoon-style slg strategy mobile game in Europe and America, which is set in the Middle Ages of Europe to create a war-torn medieval continent for players. Easy and interesting synthetic gameplay, strategic lineup and passionate war confrontation bring you the ultimate refreshing competitive fun. Build your own Indiana Jones and sweep the whole continent!