Lee's visit came just hours after North Korea fired ballistic missiles from Pyongyang towards the sea.
Are ties between China and South Korea deepening? In the last six years, no other South Korean leader has visited Beijing, and Lee's meeting with Xi will be his second in two months. Lee's four-day trip to China is also his first since he took office in June last year and comes amid heightened tensions over China's military drills around Taiwan, over which China claims sovereignty.
