G7 is the summit of the Western Group of Seven (G7), which is made up of seven western industrial countries: Gome, Britain, France, Germany, Italy, Canada and Japan. It is the predecessor of the current G8 Summit. G7 meeting is a summit meeting held by the United States, Britain, France, Germany, Japan, Italy and Canada to study the economic situation and coordinate policies, which began in 1975. Years of operation have made the G7 meeting a summit of major developed industrial countries in the west, and many international action plans have been reached within this framework. For example, in the political field, at the end of last century, the G7 reached an agreement on launching the Kosovo war and sharing the related war costs; In the economic field, the famous Plaza Accord and the aid to the financial crisis in Southeast Asia are also the cooperation results of G7.

G8 Summit evolved from g-7 summit, and the eight participating countries are also called G8. The G8 countries refer to the United States, Britain, France, Germany, Italy, Canada, Japan and Russia. The G8 summit is the highest form of globalization in the political field and the concentrated expression of globalization, so it is often fiercely resisted by anti-globalization people and organizations.

g8+5 is G8 and G5. It's said in G8. G5: Five developing countries: China, India, South Africa, Mexico and Brazil.

the G2, or G2, consists of G8 (the United States, Japan, Germany, France, Britain, Italy, Canada and Russia), eleven important emerging industrial countries (China, Argentina, Australia, Brazil, India, Indonesia, Mexico, Saudi Arabia, South Africa, South Korea and Turkey) and the European Union. In accordance with established practice, the International Monetary Fund and the World Bank attend meetings of the organization as nonvoting delegates. The G2 accounts for about 85% of the world's GDP and has a population of about 4 billion.

BRIC quoted the English initials of Brazil, Russian, Indian and China. Because the word is similar to Brick in English, it is called "BRIC". After South Africa's accession, its English word will be changed to "BRICS" and renamed as "BRICS". The concept of "G2" means that China and the United States will form a Group to replace the old G8, that is, the G8, to work together to solve the world economic problems. The concept of G2 was put forward by fred Bergsten, a famous American economist. He held a media conference call after the conclusion of the China-US Strategic Economic Dialogue to publicize his "G2" concept. He believes that China is already a veritable economic superpower. The United States should complete China, make it a legitimate architect and manager of the international economic order, and make China match its new role as a global economic superpower.