GDP was invented and used in the west, mainly for use. Well, foreigners are anxious now, and China's GDP is seriously underestimated. China's consumption of bulk commodities accounts for nearly half of the world's total, but its industrial output value is only a quarter of that of the world, which is obviously low. The proportion of tertiary industry in GDP is also low. Moreover, there are many loopholes in China's statistical methods. It is not surprising that the actual economic scale is 30% to 50% higher than the current figure. In other words, GDP is not a special product used to fool us. But to fool the West with the rules of the game used by this western country to fool people, but foreigners are not stupid. Other figures can be compiled, and import and export data cannot be falsified. Because trade is bilateral. Import and export data should be roughly consistent with other countries. There is no way to import fake raw materials. The futures trading market has trading records. Based on this and CPI, it can be roughly inferred that China's GDP is much higher than that published. One more thing, GDP is an indicator to measure the economy invented and popularized in the west. Before making a more accurate measure, GDP still has some authority, but it depends on who plays the game thoroughly.