Here are some methods and suggestions that can be applied to performing arts, negotiation, psychological training, and as self-regulation techniques. However, please note that long-term or frequent concealment of true feelings may have an impact on mental health. It is recommended to use them in appropriate situations and pay attention to the importance of honesty and transparency. 1. Clarify goals and situations • First determine what "different mental states" you want to show, such as calm, happy, determined, or other states. Clarifying your goals can help you practice and adjust in a targeted manner. • Analyze the environment and the details that the other party may pay attention to, and consider which behaviors, tones, expressions, or gestures are likely to reveal true emotions. 2. Learn and borrow acting skills • Expression management: Practice controlling facial expressions to match your inner emotions. Actors often use mirrors to repeat rehearsals to observe and correct subtle differences. • Body language: Adjust posture, gestures, and eye contact to match body language with the state you want to show. For example, if you want to appear calm, you can practice slow and steady movements. • Tone and speed: Adjust your speed, volume, and tone to create a specific emotional atmosphere. A steady and powerful tone of voice can often give people a sense of confidence and calmness. 3. Internal adjustment and psychological suggestion • Psychological suggestion: repeatedly telling yourself to enter the "target state" in your mind, this self-suggestion can affect your emotional expression to a certain extent. • Emotional reconstruction: using cognitive reconstruction or emotion regulation techniques, trying to "transform" yourself emotionally, you must first construct the desired feelings in your mind, and then let them externalize. • Recall or imagine a situation you have experienced that matches the target state, thereby stimulating the corresponding response of the body and nervous system. 4. Control and practice of details • Micro-expression training: Micro-expressions may inadvertently reveal your true emotions. It is very helpful to identify and control micro-expressions by watching relevant videos or participating in relevant courses. • Control breathing: Deep breathing or regular breathing can help you stabilize your emotions and maintain a sense of rhythm, and also help to cover up sudden emotional fluctuations. • Repeated practice: practice multiple times in a safe and private environment, and ask friends or professionals to help observe your performance and give feedback, and gradually reach a level that is not easy to be detected. 5. Be aware of the situation and moderation • Use it flexibly: You may need different strategies in different situations. Performances can be carefully designed, but hiding your true state for a long time in life may lead to increased inner pressure. • Maintain your self and ethical bottom line: Hiding your true feelings is understandable in necessary professional or social situations, but when it involves misleading others to gain improper benefits, it may cause interpersonal or ethical issues, so it should be used with caution. In short, showing a mental state that is different from your true inner state is actually a combination of physical and mental regulation and performance skills, which requires practice from all aspects of inner mobilization, external behavior and language expression. It is recommended to apply these techniques in scenarios where necessary, while paying attention to the health and long-term balance of your own emotions.