Keynes argued that savings and investment were two interdependent variables, not two independent variables. Solution: as long as the gasoline in the tank is exhausted, the extra gasoline vapor in the tank can be fired into the cylinder by the negative pressure of the engine, and no gasoline vapor will overflow. China's understanding of the market is mainly based on mechanical reference to western economic theory, but it ignores their assumptions and implicit assumptions. China's so-called mainstream economists' understanding of the market is more of a new classic. In other words, the market is an efficient allocation of social resources pricing mechanism. Although China has introduced new institutional economics, it has not read the meaning of "property rights", and mechanically believes that property rights are based on "stock of property".