Knowing ourselves and knowing ourselves is the most incisive military thought in Sun Tzu's Art of War. At the same time, the strategy he advocated is also based on understanding the strength of the enemy and ourselves, so we think it runs through the Art of War. What is a bosom friend? There are five advantages to knowing victory. Only by strictly examining and analyzing one's own conditions can we objectively analyze and know where one's military advantages lie, so as to make strategic and tactical arrangements. Know yourself and know yourself, that is, to deeply understand the enemy's strength, analyze the enemy's strengths and weaknesses, so as to avoid the strong and weaken, adapt to the enemy's situation and adopt different countermeasures. The so-called knowing yourself and yourself is to plan for winning a battle thousands of miles away.