Mathematics is the king of science. Obviously, any subject in the digital age is inseparable from mathematics. Those who leave mathematics, such as poetry and Peking Opera, are abandoned by the times if they still abandon the exquisiteness of mathematics and dare to despise digital media. Only China's economics despises mathematics with dauntless spirit when it needs mathematics help most. Whether it is macroeconomics, microeconomics, or political economy that was once regarded as a classic by us, we all disdain to treat mathematics, the little brother of pure natural science, with an extremely conceited attitude. At most, when we need to polish it, do a little "budgetary estimate" on it, even if we pay enough attention to this little brother, the king of science? In our economics, citizens do not count!

Undeniably, there are problems in China's economy, both macro and micro. Due to institutional reasons, people can have different views. "As if" is outside the system, but the author found a mathematical reason. That's a mathematical "budget estimate" inadvertently used by China's economics. This "budget estimate" is a big problem for China's economy.