I want a sample of how to write a proposal to invite a company from a foreign country to open a business in my country.

Hi, arthurboyo!

I'm sure that you know more about that kind of business than anyone else does here. My suggestion would be for you to post a draft here, without putting any contact information in it, of what you're thinking of writing, and then I'm sure that there will be those of us who'll be willing to come along to suggest to you ways that you might make improvements to it.

Thanks!