Zelenskyy: 'During the meetings with the President of Serbia, Aleksandar Vučić, today and yesterday, we talked about specific things that can add strength to our infrastructure - ports and railways in both countries, about the development of economies, reconstruction and creation of jobs in Ukraine and Serbia. We are working to prepare everything for the conclusion of an agreement on a free trade zone by the end of this year.We separately discussed the challenges of the coming winter, when, due to Russian strikes, there are practically no whole thermal power plants left in Ukraine and the enemy is aimed at making people's lives unbearable. No matter what happens, we must give people every opportunity to live, which is why our energy cooperation is of great importance. '