The negotiation between Ukraine and Russia in relation to the new contract on gas transit could resume only after the inauguration of Volodymyr Zelenskiy and his talk with Russian President Vladimir Putin, and maybe this will happen in June, Chairman of the Executive Board of NJSC Naftogaz Ukrainy Andriy Kobolyev said at the Game of Thrones: Final Season? an international investment conference in Kyiv on May 16.