The cornucopia in geomantic omen symbolizes the geomantic ornaments that can make money and accumulate wealth, and has a very auspicious geomantic effect.
Cash cow originally refers to a treasure tree in mythology. You lose a lot of money when you shake it. Now it refers to the person or thing by which money is obtained. Welcoming wealth means welcoming the god of wealth during the Chinese New Year. What it means here is that wealth from all directions is gathered here.