Is it hot underground in Mataihao Coal Mine?

Very sexy. Mataihao Coal Mine is a coal project jointly developed and constructed by Erdos Cashmere Group and Yongmei Group. Underground heat in mataihao coal mine. Mine refers to a shaft or roadway dug to reach underground mineral deposits, from which underground mineral deposits can be mined by excavation or other mining methods. People usually want to acquire natural resources, such as ores, precious stones or coal.