In international relations, there are some covert ways that can be used to threaten or pressure other countries. The following are some common situations: **Economic field**: - **Hidden trade restrictions**: Setting up invisible trade barriers through complex technical regulations, standards, inspection and quarantine measures, etc., to prevent the other party's goods from entering the domestic market. - **Financial means**: For example, hidden sanctions threats against financial institutions in specific countries, restricting their international financial business, or interfering with the stability of their domestic financial markets. **Diplomatic field**: - **Manipulation of public opinion**: By controlling media channels and guiding the direction of international public opinion, creating an international public opinion atmosphere that is unfavorable to the target country and exerting psychological pressure. - **Restriction of diplomatic contacts**: Reducing high-level mutual visits, restricting the scope of diplomatic missions, etc., to send unfriendly signals. **Intelligence field**: - **Intelligence penetration and deterrence**: Sending agents to collect sensitive information to expose intelligence that may damage the interests or reputation of the other country to carry out potential threats. - **Cyber attacks and information warfare**: Launching covert cyber attacks to destroy the other party's critical infrastructure or steal important data, while demonstrating one's own network capabilities and deterring. **Military field**: - **Military deployment adjustment**: Conducting military exercises and military mobilizations around the other side, which may seem like normal military activities, but actually convey strategic deterrence intentions. - **Hidden military support**: Providing secret military assistance or intelligence support to third-party forces in conflict with the target country to indirectly influence the situation in the target country.