俄官员：俄罗斯正在与中东国家磋商飞机联合研发与生产事宜，其中涵盖第五代战斗机

Group 1 - Russia is in discussions with Middle Eastern countries regarding joint development and production of aircraft, including fifth-generation fighter jets [1][3] - The negotiations are described as constructive, aiming to establish mutually recognized technical and organizational implementation plans [3] - The potential collaboration projects are characterized by long cycles and high technical difficulty, necessitating detailed and in-depth research planning [3]