1. The mine scale is large: the mine covers an area of 0.72 1 km2, and the annual ore mining output is about10 million tons.

2. Green environmental protection: In recent years, nearly 70 million yuan has been invested in "green mine" management in the quarry of Daao Reservoir, trying to protect the environment. For example, after several hills in the lower part of the mine were treated, a large area of grass and shrubs grew on the original bare mining face, and flowers and trees were planted on the low slope.