Without directly revealing the information you have, you can hint at them through some subtle methods: 1. **Indirect questioning**: Bring up topics related to the information in the conversation and observe their reactions. For example, bring up situations or problems that are similar to their important information. 2. **Use vague language**: Mention some details that seem ordinary but the other party may know them well, so as to attract their attention. 3. **Show confidence**: Show a sense of confidence and calmness when communicating with the other party, making the other party feel that you may know more than you show. 4. **Create coincidences**: Intentionally or unintentionally mention some events or situations that are accidentally related to their information, so that they start to associate. 5. **Use hints**: Subtly point out some information or details that may make the other party associate in the conversation, but do not explicitly state that you know. Remember to be cautious when using these strategies to avoid causing confrontation or suspicion from the other party. Respecting privacy and ethical boundaries is very important.