1, Ireland is an independent country with the full name of RepublicofIreland and Dublin as its capital. Northern Ireland is a part of Britain. Its full name is Northern Ireland, and its capital is Belfast.
2. The Republic of Ireland has a parliamentary system, with the President as the head of government and the Prime Minister as the Prime Minister; Northern Ireland, on the other hand, adopts a democratic parliamentary system, with the head of government as the chief minister.
3. The official languages of Ireland and China are Irish and English, which are parallel; The official languages of Northern Ireland are English and Irish, but they are used less frequently.