Special lecturer of China Enterprise Management Training Network, serving well-known domestic IT enterprises and the top 50 private high-tech enterprises in Dongguan. He has served as manager of enterprise cost department, manager of information department, manager of audit department, manager of finance department, chief financial officer and vice president of finance. Based on years of study and work practice, Ceng Laoshi summed up a set of effective operational control tools, such as C2C mode of enterprise fund control, performance three-ring theory and 12345 performance control mode, golden triangle of enterprise profit, enterprise development space theory, 6R mode of cost reduction, three firewalls of accounting quality control, and inventory 656 control mode. And extract simple and easy-to-understand management concepts, such as the account control concept of sales first and collection first; Inventory is a liability and sluggishness is a loss, which helps enterprises form a healthy and benign control culture. Ceng Laoshi has helped more than 65,438,000 enterprises to change their financial management concepts and improve their financial management systems. The overall profit of the enterprise increased by more than 50%, and the quality of profit was obviously improved. Monograph: Understand the methods of increasing financial profit, controlling cash flow and working capital, comprehensively budgeting and reducing costs.