The leaders of China and Japan have met for formal talks after more than two years of severe tension over a territorial dispute. Chinese President Xi Jinping and Japanese PM Shinzo Abe met on the sidelines of the Asia-Pacific Economic Co-operation (Apec) summit in Beijing. Their first meeting included a public handshake with little sign of warmth. In a speech to Apec, President Obama has meanwhile announced big changes to visa arrangements with China. Multiple entry short-term visas for businessmen and tourists will be extended to 10 years - up from one year. Those for students rise from one year to five.