To identify the opponent's weaknesses during a fight and end the fight quickly, you can refer to the following points: 1. **Observe the opponent's stance and movement**: Pay attention to whether the opponent's posture is stable and whether the movement is flexible. Generally, opponents with unstable footsteps or unstable center of gravity are more likely to be knocked down. 2. **Find defensive loopholes**: Observe the opponent's defensive habits, such as hand position, eye focus, etc. Generally, the head, abdomen and ribs are easier to attack. 3. **Analyze the opponent's fighting style**: By observing the opponent's attack method, understand their rhythm and attack habits, and find the gap between attacks to counterattack. 4. **Identify signs of fatigue**: If the opponent shows signs of fatigue such as shortness of breath and slow movements during the fight, you can take the opportunity to attack. 5. **Use the environment**: Observe the surrounding environment and look for objects that can help you, such as walls, obstacles, etc., and use these environmental factors to attack or dodge. 6. **Psychological tactics**: Use provocations, feints and other means to confuse the opponent and induce the opponent to reveal flaws. 7. **Precision strike**: Once you find a weakness, quickly concentrate your strength to strike accurately, such as hitting the opponent's pain points or key parts, to end the fight as soon as possible. Please note that fighting is dangerous, and the most important thing is to avoid violence and actively seek peaceful solutions to problems. If possible, choose to escape or seek help.