It is normal that the cash flow generated by investment activities is generally negative, indicating that the company has investment activities to expand production, indicating that the company has development prospects before expanding investment. If it is positive, it means that the company sells assets, shrinks its operations and reduces risks. When the company is in the expansion period, the general investment cash flow is negative, the financing cash flow is positive and the operating activities are negative. In the harvest period, investment cash flow is positive, financing is negative, and business activities are positive.