How do you say immigration country in English?

Singapore is a multi-ethnic immigrant country and one of the most international countries in the world. Singapore is one of the richest countries in the world. Singapore has made great achievements in urban cleanliness, so it has the reputation of "garden city". It's my pleasure to work there. )

The Republic of Singapore is not only a multi-ethnic immigrant country, but also one of the countries with the highest degree of internationalization. In addition, Singapore is also one of the richest countries in the world. Singapore is known as the "Garden City" for its outstanding performance in urban environmental protection. Therefore, it will be my honor to work there.