Marx's dialectical materialism theory well explains the relationship between value and price (the price you said). Value is undifferentiated human labor condensed in commodities. If there is use value, there can be no commodity value. Human labor creates value, but only through exchange can it be compensated, sold to others, and others get use value. Generally, it is equivalent exchange (social labor time is the same), and paper money acts as an intermediary and acts as a universal equivalent. This is the price, which is affected by the relationship between supply and demand and fluctuates around the value. Since it is writing a composition, this sentence means that people nowadays only see the appearance of price, but can't see the essence of value. Is the relationship between phenomenon and essence.