US Defense Secretary Robert Gates has concluded his three-day visit to China and flies to Japan, the next stop of his Asian tour. Gates visited the headquarters of the PLA's Second Artillery Corps on Wednesday morning.

For more discussion on the US Defense Secretary's China tour, we are joined by our current affairs commentator, Tao Wenzhao, from the Tsinghua Center for China-US Relations.

Q1: What in your view is the role of military ties in the overall relations between China and the US?

Q2: The test flight of China's J-20 stealth fighter has been creating quite a stir. What's your reading on that?