Why did Britain use the name Great when it appeared at the opening ceremony of the Olympic Games?

Because in the national shorthand of Europe, Britain is defined as GB. Therefore, Great Britain in the Olympic Games also came from this. Athletes from Northern Ireland can compete as British or Irish athletes.

In fact, all the athletes in the British Olympic delegation belong to Great Britain, including Northern Ireland, which is still fighting for independence. As the Olympic delegation, the British delegation does not include Northern Ireland, just as China has China delegation, China Hongkong delegation, China Macau delegation and China Taipei delegation.

Introduction:

The United Kingdom of Great Britain and Northern Ireland (English: United Kingdom of Great Britain and Northern Ireland) is called "Britain" for short. The British Isles, which originated in the northwest of continental Europe, are surrounded by the North Sea, the English Channel, the celtic sea, the Irish Sea and the Atlantic Ocean.

Britain is an island country in western Europe, consisting of England, Wales and Scotland on the island of Great Britain, Northern Ireland in the northeast of Ireland and a series of affiliated islands. In addition to the mainland, there are 14 overseas territories with a total population of over 66 million, among which the English (Anglo-Saxons) are the main ethnic group, accounting for 83.9% of the total population of China.

Refer to the above? Baidu Encyclopedia-UK