突发！美国、俄罗斯，重大变数！

Core Viewpoint - The ongoing negotiations between the US and Russia regarding the Ukraine conflict have faced significant challenges, with both sides unable to reach a joint statement due to Ukraine's stance, despite initial positive expectations from the US side [2][4][9]. Group 1: Negotiation Developments - The US and Russia held talks in Riyadh on March 24, which lasted over 12 hours, but failed to produce a joint statement due to disagreements primarily stemming from Ukraine's position [9]. - Russian Foreign Minister Lavrov indicated that discussions included the safety of navigation in the Black Sea and the need for clear guarantees regarding the resumption of grain exports [5][6]. - Lavrov emphasized that Russia would not tolerate any ambiguity in proposals related to the Black Sea [7]. Group 2: Ongoing Conflict - Despite the negotiations, the conflict between Russia and Ukraine continues, with both sides accusing each other of lacking sincerity in reaching a ceasefire [12][16]. - Ukraine's Defense Minister stated that the recent talks with the US were productive, focusing on key issues including energy [11]. - The situation remains tense, with reports of ongoing attacks and military actions from both sides, indicating that the conflict is far from resolution [15][16]. Group 3: Strategic Implications - Analysts suggest that as negotiations progress, the battlefield objectives of both Russia and Ukraine are shifting from purely military goals to strategies that serve their negotiation positions [16]. - The recent military actions by Russia in the Kursk region are seen as efforts to weaken Ukraine's bargaining power at the negotiation table [16].