特朗普，突发威胁！

Group 1 - The core message of the articles revolves around the upcoming meeting between U.S. President Trump and Russian President Putin, focusing on the potential for a ceasefire in the ongoing Russia-Ukraine conflict [1][2][4] - Trump has warned that if Putin does not agree to a ceasefire during their meeting, Russia will face "very serious consequences" [1][2] - The discussions will not include territorial divisions, emphasizing that any negotiations regarding territory must involve Ukraine directly [2][4] Group 2 - Ukrainian President Zelensky has expressed that the key agenda for the Trump-Putin meeting is to achieve an immediate ceasefire [4] - There is a consensus among European leaders and Trump that a ceasefire should precede any peace negotiations, with Ukraine needing to be involved in discussions about territorial concessions [2][4] - Zelensky stated that any discussions about Ukraine's territorial integrity cannot occur without considering the will of the Ukrainian people and the constitution [5]