The Chinese parent company that in 2018, after four failed attempts to sell it, took over 63% of RTB Bor as a strategic partner, and that through Zijin Mining also owns the Čukaru Peki mine. The partnership agreement has not been published in full; according to the European Green Party, it contains a clause under which no one will require new environmental permits in the future. A worker was killed at Čukaru Peki in 2024, and the public has not been informed of the results of the investigation.