In 2019 the Czech government gave preliminary approval for at least one new nuclear power unit for about 2035 to replace the four units expected to shut down between 2035 and 2037. The financial model proposed is a state guarantee so finance can be obtained at government interest rates, but no subsidy on operating costs or above market-price electricity rates. In January 2021 Chinese companies were excluded from bidding for political and security reasons, following advice from the security services of EU and NATO member states. In April 2021, it was announced that Russia's Rosatom would be excluded as well, after it has been discovered that two Russian agents were perpetrators of the 2014 Vrbětice ammunition warehouses explosions.