Is Dominica the same country as Dominica which just established diplomatic relations with China?

They are different countries. One country is Dominica for short, and the other is Dominica.

Both countries are Caribbean island countries. Dominica, which just established diplomatic relations with China, has a larger area and a larger population, and English is the official language. Dominica, a popular passport project in the immigration market, whose official language is English, is now a member of the Commonwealth and one of the most beautiful islands in the Caribbean. It was once rated as one of the happiest places to live in the world, with a large number of centenarians.