KEY POINTS ABOUT THE WTO
Membership: The World Trade Organization has 148 member nations, including China, which joined in December 2001. There are also 33 observer nations, including Russia, Ukraine, Saudi Arabia, Iran and Iraq.
Key players: European Union, United States, China, Cairns Group (agricultural producers), Japan, Brazil, India.
Doha: The Doha agenda takes its name from a ministerial meeting in the Qatari capital in November 2001, at which it was agreed to launch new trade negotiations.
Cancun: The September 2003 ministerial meeting at the Mexican resort of Cancun broke up without agreement on agriculture and the "Singapore issues", which deal with trade and investment facilitation and transparency in government procurement.
Hong Kong: Key issues for discussion at the Hong Kong ministerial meeting include agriculture, services, textiles and clothing, intellectual property rights, subsidies, rules of origin, customs valuation, anti-dumping, investment, sanitary measures and technical barriers.
Potential stumbling blocks: Agricultural reform, intellectual property rights, particularly for medicines.