New hot - spots , serious imbalances in economic development , growing gap between the north and south , prolonged increase in oil prices , trade protectionism in new forms , increasingly acute global challenges of terrorism , environmental pollution , natural calamities and communicable diseases - all these pose real threats to world peace and development 地区热点此起彼伏，经济发展失衡仍然突出，南北差距继续扩大，油价长期在高位波动，贸易保护主义上升并有新的表现，恐怖主义、环境污染、自然灾害、传染病等全球性问题日益突出，对世界和平与发展构成现实威胁。
President george w . bush was right also , too , when he said , " we welcome the emergence of a strong , peaceful and prosperous china . " such a china can be a powerful partner in meeting the global challenges of the 21st century and in realizing the highest hopes of both of our peoples for a safer , better world 乔治? w ?布什还说得对： "我们欢迎一个强大、和平与繁荣的中国的兴起。 "这样的一个中国能够成为一个强大的伴，应对21世纪面临的全球性挑战和实现两国人民对更安全、更美好的世界的最高愿望。
China had to open wider to the outside world after it had joined in wto . cities of china will meet global challenge and opportunities . governments of cities must grasp the key factors of competition , understand the cities " preponderant and inferior position and establish corresponding policy so as to step up competitiveness 自我国加入wto后，就面临着城市发展和竞争的问题与机遇，城市政府必须把握城市竞争的关键，了解城市自身的地位和处境、优势和不足，从而制定新的竞争战略，以全面提升城市的竞争力。
