It is difficult for many modern office workers to live a smart life in society with a single salary. After all, after all kinds of expenses, there is not much left over every month . And they gave most of their time to the company. Under various pressures, such as housing loans, car loans, children"s tuition fees, living and other expenses, consumption and income are seriously inconsistent, many people will think of looking for a side business, rather than an arbitrary resignation.