Mayskoye is predominantly an underground operation (open pit mining of an oxidised cap took place in 2013 and 2014). Mining is by shrinkage stoping mining methods. Ore is refractory in nature. The process plant has a capacity of 850kt/a and comprises a conventional flotation circuit on site. Concentrate produced is transported to the Amursk pressure oxidation (POX) plant for further processing and cyanidation or shipped to third-party off-takers in China.