There was a sudden fire in a theater full of spectators, and those eager to escape were eager to escape from the limited emergency exit as soon as possible, but when everyone crowded into a group, it was bound to affect the escape due to mutual crowding and trample on each other Speed. In this emergency situation, the best solution is that everyone adopts a cooperative strategy at the same time and pass the emergency exit in an orderly manner according to certain rules. The main emphasis of this text is:. ['The parties will harm both their own interests and the interests of others.', 'Self-interest strategies often fail to achieve the goal of maximizing their own returns.', 'Protecting your own interests requires cooperation and paying a price.', 'Cooperation strategies are more conducive to maximizing the utility of the parties than self-interest strategies.']