Preschool education is an integral part of education, and the day when human society was born is the time when preschool education came into being. Preschool education is the initial stage of educational activities and the first educational stage of life. Preschool education in a broad sense refers to all activities that have an impact on the physical and mental development of preschool children. It comes from all aspects of society, schools and families. Preschool education in a narrow sense refers to the education implemented by specialized preschool education institutions, namely nursery and kindergarten education.

Finance refers to the issuance, circulation and withdrawal of money, the issuance and recovery of loans, the deposit and withdrawal, the exchange of foreign exchange and other economic activities.

Finance (FIN) is to realize the equivalent circulation of value and profit after re-integration of existing resources. The professional view is that the process from saving to investment can be narrowly understood as financial dynamic monetary economics. In the era of gold standard, gold is recognized as the best value representative by the world. Gold refers to gold, melting. At first, it refers to melting solid into liquid, and also refers to financing. So finance is to melt gold and trade it separately, that is, the circulation of value. Now gold has been largely replaced by paper money, electronic money and so on, but the circulation of gold as a value has not changed. Without the circulation of value, finance will become a "pool of stagnant water". Without the conversion of value, the economy will not operate. Like many other disciplines, the essence of finance is to study and explore the objective laws of finance. However, due to the short time for human beings to enter the financial society, human beings are still in the era of financial flooding, and there is still a long way to go to discover the laws of finance. Because of this, financial crises occur frequently!