The issue focused on by the Chinese government on Tuesday was that of national security. But it was also on the subject of national defence.It was an opportunity for both sides to try to focus their efforts on what they think is the best way to prevent such problems from happening in the future.This was the second day of an international conference on China's legal environment. This year's conference was held in Beijing.It was being held as part of the International Year of Internet Freedom. But it was also part of a