Report and vocabulary
This is Siberia - over 1,000 metres below ground.
And miners at Russia's largest nickel mine were given the surprise treat of some cheerful music.
Musicians swapped their stage costumes for hard hats and overalls for the day.
The company says it's all part of a plan to boost productivity and hope to hold more underground cultural activities to keep the positive attitude going.
- nickel mine
a hole in the ground from which nickel, a silver-white metal, is removed
something special and enjoyable you do or buy for yourself or someone else
gave something in exchange for something else
- boost productivity
increase the rate at which goods are produced
- positive attitude
good feeling or opinion about something