Therefore, if the matter is serious, it will fall within the purview of foreign city officials. Saving the small is about benefiting foreign countries. Before the national interest is established, the land will be generous. Although the Lord is humble, people are ministers. Therefore, to serve a powerful country, only those who engage in corporate checks and balances can win over senior officials at home with the help of foreign forces; Saving a small country can only benefit those who engage in vertical and horizontal cooperation from abroad by virtue of domestic strength. The national interest was not established, but the liegeman got the fief and rich salary first. Although the status of the monarch has decreased, the liegeman has improved instead; Although the country's land has decreased, private people have become rich. If things can be successful, strategists will be reused for a long time on their own; If things fail, the strategist will retire home with wealth and enjoy life. If the monarch listens to the lobbying of his subordinates and gives them a high title and salary before things are done, they will not be punished if things are not done; So, who are the lobbyists who don't want to continue to speculate with the words of hunting for fame and profit? Therefore, the emergence of the situation that the country broke the king's death was caused by listening to the rhetoric of the strategists. What is the reason? This is because the monarch can't distinguish between public and private interests, doesn't examine whether his speech is fair and correct, and doesn't resolutely punish him after defeat. Military strategists and strategists all say: "When conducting diplomatic activities, those who achieve great things can unify the whole country, and those who achieve little things can also ensure security." The so-called unification-the world, is to be able to defeat other countries; The so-called security of Wang Bao refers to the inviolability of the country. Qiang Bing can beat other countries. National security is inviolable. The prosperity and stability of the country can not be achieved by diplomatic activities, but only by doing a good job in internal affairs. If we don't practice at home now, but concentrate on diplomacy, we will certainly achieve the goal of national stability and prosperity.