I intend to open a publisher company. I want to know what kind of book are you looking for. Need it be cheap, beautiful, with hardcover?

You must not mean a publishing company per se, but possibly a book store. Please clarify.

You might as well give up now. The entire book industry, from publishing to manufacturing to editing to designing to selling, is nothing like it was just a few years ago, as fewer and fewer people buy new, physical books, instead of digital or used books. You will be competing against old established companies that are struggling to stay in business. Even companies for self-published writers are now demanding more money and promising nothing.