A very nihilistic numerology has been called "potential" since ancient times. The development of history depends on this invisible and intangible "potential", which can neither be affirmed nor denied. When the "potential" reaches a certain level, it presents a phenomenon. All connections in the world are dynamic processes of "potential", which is very abstract and general, but I can give an example. Friends who like playing mahjong will find that they may have lost the first few rounds of cards and could not become cards, but suddenly they became hands and then they became cards one after another. This is actually a manifestation of "potential".