President Lee Jae Myung is set to visit Beijing next week for a summit with Chinese President Xi Jinping, drawing attention to whether the rare trip by a South Korean leader will yield tangible results as long-strained bilateral ties show signs of improvement. Analysts say that while the two sides are unlikely to reach concrete agreements on sensitive security issues, progress could be made in economic and cultural areas. According to the presidential office, Lee will depart on Sunday for a four-day visit to China. He will spend three days in Beijing, where the summit with Xi will be held, before traveling to Shanghai on Tuesday. The trip will mark the first visit by a South Korean president to China in nine years. Relations between Seoul and Beijing have been cool for much of that period, though signs of improvement emerged after the two leaders met in November on the sidelines of the Asia-Pacific Economic Cooperation summit in Gyeongju, North Gyeongsang Province. Still, Lee's visit comes at a sensitive moment, with the two countries remaining far apart on key security issues. South Korea