Finally, China should try to turn challenges into opportunities. After 9/11, China raised the issue of strategic opportunity period. Although China is facing serious challenges to its national security, it can still turn challenges into opportunities so long as it is good at seizing upon opportunities and making a good review and judgment of the situation. 9/11 at the price of thousands of lives sounded the alarm bell for the world including China. Chinese government and people are called to reevaluate China's security strategy. China should employ newer dimensions by which to observe, analyze, and assess its relations with other nations. For instance, China should take its foreign relations as a totality with not only bilateral approaches, but also multilateral approaches; China should achieve breakthroughs, if chances so emerge, on crucial issues of overall importance, such as security and arms control; China should make progress by cooperation on common interests, such as economic cooperation, environment and counter-terrorism; and China should make concerted efforts to address global issues, such as bio-engineering and its relevant issues.