不是10点！乌官员称尚未就俄乌谈判开始时间达成一致

Group 1 - The article reports that the Ukrainian National Security and Defense Council's head, Andriy Kovalenko, stated that Russia is spreading false information about direct negotiations between Russia and Ukraine in Istanbul, which are not scheduled to take place [1] - There were previous reports suggesting that direct negotiations could resume on May 15 at 10 AM local time, with Russian representatives arriving in Istanbul [1] Group 2 - The article mentions that Putin has confirmed the negotiation list and that Zelensky has departed for Turkey, indicating ongoing diplomatic efforts [2] - It highlights that U.S. Secretary of State is preparing for the talks, suggesting international involvement in the negotiation process [2]