What does the lucky mouse in Huang Caishen's hand mean? What's the story?

Huang Caishen is the richest of all the wealth gods. He can give wealth to the world, but three conditions must be met to give wealth. First, he should have bodhicitta, but he should be the first Buddhist with five precepts and ten good deeds. Third, he should be endowed with wealth after being instilled with this wealth method and practicing it. That mouse is called the treasure spitting mouse, which can spit out the wealth of treasure and make people live a rich life.

In addition, in folk customs, the mouse is also one of the three sacred objects (cow, turtle and mouse) handed down by human beings for a long time. Among them, suncus murinus symbolizes the meaning of "rat money" and "old counting money", and is often used as a fortune star in Feng Shui, which has the functions of attracting wealth, turning evil into evil and praying for good luck.