Ukrainian President Volodymyr Zelenskyy signed a decree on the 26th, approving the implementation of the National Security and Defense Council of Ukraine's decision to strengthen urban perimeter defense. According to the decision, Ukraine will advance the construction of engineering obstacle zones around cities and improve relevant defense measures and implementation mechanisms. The full text of the decision has been classified as "for official use only," and its specific content has not yet been disclosed. Oleksiy Danilov, Secretary of the National Security and Defense Council of Ukraine, is responsible for overseeing the implementation of the decision. (CCTV)