专家：俄乌短期内实现直接谈判难度大

Core Viewpoint - The likelihood of direct negotiations between Russia and Ukraine occurring on May 15 is low due to differing preconditions for talks [1] Group 1: Negotiation Proposals - Russian President Putin proposed to restart direct negotiations between Russia and Ukraine on May 15 in Istanbul without preconditions [1] - Ukrainian President Zelensky stated he would be waiting for Putin in Turkey on the same date for discussions [1] Group 2: Analysis of Current Situation - Expert analysis indicates that Ukraine insists on a "ceasefire first, then negotiations" approach, which is supported by major European powers [1] - The disagreement over whether to negotiate or ceasefire first is more complex than it appears, as a ceasefire requires mutual recognition and formal contact between both parties [1]