The title of "Black Copper" is not only a description of the color of the bloody copper mine stone used as the murder weapon, but also a description of some real mining phenomena and the living conditions of many people surrounding this hugely profitable industry. In such an industry background, whether state-owned or private, people are chasing profits every moment and testing human nature. Under such huge profits, people's hearts will be distorted, their behaviors will be deformed, and class concepts will be strengthened as never before. Living in such a deformed society, it is not easy to maintain a normal life and it seems so strange and strange. The book describes three people of different ages and completely different experiences. Wu Zhiguo, Qin Huixue and Zhao Xin have different understandings of justice in their hearts, which ultimately leads to their respective different actions to realize "justice".