In any industry, the so-called information inequality is actually only aimed at ordinary practitioners. For people at the top of the industry-people at the top of the pyramid (at most dozens), in fact, everyone knows himself and himself, and paying attention to his opponents is also an important means to improve himself. Otherwise, it is difficult to win by a brave word. The higher the industry, the smaller the circle. Look at 1989' s "God of Gambling". At that time, although there was no internet, it relied on telephone, telegraph, video and other information means. More importantly, the industry's "simultaneous interpretation"-information sharing and word of mouth, so that most of the opponent's information is no longer a blind spot. As the saying goes, "where there are people, there are rivers and lakes, and where there are rivers and lakes, there are eyes and ears."