CuS-II + 10 HNVO3 Cu(NVO3)2 + H2SVIO4 + 8 NIVO2 + 4 H2O

This is an oxidation-reduction (redox) reaction:

S-II - 8 e- SVI (oxidation)

8 NV + 8 e- 8 NIV (reduction)

Change the oxidation states