plot tells the story of three sisters from an ordinary family. Because they are not rich in life, they are very frugal in using money. In order to allow the youngest sister in the family to study abroad, it is also the accumulation of hard work by the sisters. However, the money was taken abroad by my mother overnight, and the sisters regretted that they could not fulfill their sister's wishes in addition to their anger towards their mother.

What will your reaction be when you get huge wealth in an accident? This unexpected fortune will also be involved in a series of family, political and criminal struggles. It is painful when you have no money, but you may not be happy when you have real money. What exactly do we think about money? Or do we need to have how much money we need to feel truly happy?
Money Psychology
Psychological Account (Mental Accounting) refers to the fact that the entity has only one account, but in our hearts, the money will be summarized into different psychological accounts according to different channels of obtaining money. When money is in different psychological accounts, we will have completely different attitudes to spend money. For example, if we earned our salary, we will be more inclined to save it or really spend it on essential consumption. However, if today is a winning or winning bonus, we may classify it as a surprise, and will be more generous in spending this type of money, or even squander.

Psychological experiment, the situation is that before watching a movie, I found that my movie ticket of 300 yuan was lost, or 300 yuan was lost, will I spend money to buy a new ticket in the future? If the movie ticket is lost, we will buy a new ticket, but if the money is lost, we will choose to give up watching a movie. From an economic perspective, both situations lost 300 yuan, but the results were completely different. This means that the money from buying movie tickets before was summarized into different psychological account , so the lost money will not affect the budget and expenditure of the movie ticket account.
Will you be happier if you have more money?
According to a 2010 study, income will not be completely proportional to happiness, but when the income reaches a certain point, the study of that year was that the income was $75,000 that year, income and happiness will no longer have a significant upward trend, which means that the higher the income does not mean that the happier you will be. However, a more recent 2021 study pointed out that even if the annual income exceeds US$80,000, the higher the income, the higher the happiness it will bring.

What exactly will bring us happiness
Maslow demand theory points out that most individual desires and impulses are interrelated. From an evolutionary perspective, what can drive humans are almost all related to these core concepts. These needs are not only physiological, but also psychological, as if they are inherent in human nature. Our needs appear in the form of hierarchy, starting from low-level needs, and developing step by step to higher-level needs. The higher-level needs can be met, it will bring us more happiness.

・Physiological needs), also known as the lowest-level and most advantageous needs, such as: food, water, air, sexual desire, health.
・Safety needs are also low-level needs, including personal safety, stability in life, and protection from pain, threats or diseases.
・Love and belonging needs are higher-level needs, such as the need for friendship, love and affiliation.
・Esteem needs are higher-level needs, such as: achievement, reputation, status and promotion opportunities. Respect needs include both personal feelings about achievement or self-worth, as well as others’ recognition and respect for themselves.
・Self-actualization needs are the highest-level needs, including the needs obtained for the highest realm of truth, goodness and beauty. Therefore, the first four needs can be met, and the highest-level needs can be generated one after another. It is a derivative need, such as: self-actualization, realizing potential, etc.