What does the little gold in fortune telling mean? _ What is the meaning of Xiaojin in fortune telling?

Dear old people, what does it mean to look at the calendar and say "big money"? How is it calculated? I don't know when my son was four months old. say

The lunar calendar is divided into a big moon and a small moon, with a big moon of 30 days and a small moon of 29 days. (So there is a difference between a big month and a big year. ) The big moon represents great progress, and the small moon represents small progress. There is this annotation on the portrait of the kitchen god at home. I looked for it, but there seems to be no other relevant information record.