In China, the law has strict regulations on the protection of minors, especially on issues related to sexual behavior. According to the "Criminal Law of the People's Republic of China" and related laws and regulations, having sex with a minor, regardless of whether the minor agrees or not, may constitute a crime. Specific crimes include rape and child molestation. If an adult mistakenly thinks that the other party is an adult, but in fact the other party is a minor, this situation does not completely exempt the adult from legal responsibility. However, if an adult can prove that he or she does have reasonable reasons to believe that the other party is an adult when having sex, and does not use deception, coercion, etc. in the process, the law may consider this to a certain extent. ### How do adults legally protect themselves?： 1. **Verify age**: Before having sex with others, adults should try their best to verify the age of the other party. You can confirm the age of the other party by checking valid documents such as ID cards and passports. 2. **Keep evidence**: If the other party claims to be an adult, the adult should keep relevant evidence, such as chat history, the other party's statement, etc., to prove that they had reasonable reasons to believe that the other party was an adult at the time. 3. **Avoid contact with minors**: Adults should try their best to avoid having sex with minors, especially if the age of the other party cannot be confirmed. 4. **Legal advice**: If adults find that they may be involved in sexual behavior with minors, they should immediately seek legal advice, understand their rights and obligations, and take appropriate legal action. 5. **Avoid deception and coercion**: Under no circumstances shall adults use deception, coercion and other means to have sex with others, otherwise they will face serious legal consequences. ### Legal consequences： -**Criminal liability**: If an adult knows that the other party is a minor and has sex with him, it may constitute rape or child molestation and face criminal penalties. -**Civil liability**: Minors or their guardians may file civil lawsuits for compensation for moral damages, etc. ### Summary： Adults should exercise caution to ensure that the age of the other party is confirmed before having sex and relevant evidence is retained. If you find that you may be involved in sexual behavior with a minor, you should immediately seek legal help to avoid breaking the law. The law has strict protection for minors, and adults must respect and abide by these regulations.