Gold diggers: Illegal mining near Colombian town hits Zijin output - Reuters
10:40pm PDT - May 17th, 2021 social security - ReutersWhen China's Zijin Mining (601899.SS) paid $1 billion to buy an extensive gold mine in the Colombian Andes in late 2019, security risks were a top concern, despite an operation by the military which had beat back illegal miners.