普京称3500名乌军被包围，泽连斯基承认前线愈发艰难，美欧乌开始新一轮磋商

Group 1 - Ukraine's negotiation team, led by Oleksiy Danilov, is engaging in new discussions with the U.S. and European representatives regarding a "peace plan" draft, emphasizing the need for reliable and long-term security guarantees for Ukraine [1] - Ukrainian President Volodymyr Zelensky acknowledged the increasing difficulties faced by Ukrainian forces on the front lines during his visit to Poland, indicating a complex and challenging battlefield situation [1][3] - Zelensky reported that the Ukrainian military still controls the strategic city of Kupiansk, but Russian forces are applying pressure, with claims that 3,500 Ukrainian soldiers are surrounded near the city [3] Group 2 - A recent exchange of fallen soldiers' remains occurred, with Russia transferring 1,003 Ukrainian soldiers' remains to Ukraine and receiving 26 Russian soldiers' remains in return, as part of an agreement reached in Istanbul [5] - As of November 20, Russia has transferred over 11,000 Ukrainian soldiers' remains to Ukraine since the beginning of the year, while receiving 201 Russian soldiers' remains [5]