What industry does a mouse successfully do?

1984 what kind of industry does the genus mouse successfully do as follows.

1984 financial background, smart, but patient and meticulous. In addition, they are timid by nature and tend to be cautious and conservative. They can try their best to avoid rash advance, avoid falling into danger and break through the inherent limitations of the industry, so they are most suitable for finance and economics. The most difficult business in the grain, oil and non-staple food retail industry is grain and oil. Although it is only simple daily necessities, there are many doorways inside, the cost is not high, and there is no big loss. For the 84-year-old mouse, it is the most suitable choice because it is naturally sensitive to numbers, but it doesn't have much fortune.