In a besieged situation, robbers can usually use the following negotiation strategies to ensure a safe escape or obtain certain benefits: 1. **Keep calm**: Throughout the negotiation process, robbers should try to stay calm and avoid emotions, so that they can think and express their demands more clearly. 2. **Establish a communication channel**: Robbers can actively seek to establish communication with negotiators to make the other party believe that they will take the negotiation seriously and are willing to listen. 3. **Make reasonable demands**: Robbers should make feasible and logical demands, such as food, water, medical help or safe passage, rather than unrealistic demands. 4. **Show willingness to cooperate**: By showing their willingness to cooperate, such as allowing hostages to evacuate safely, robbers can strive to gain the initiative in the negotiation. 5. **Use hostages as bargaining chips**: Robbers can exchange their demands with negotiators through the safety of hostages, but they must be handled with caution to avoid escalating the situation. 6. **Create time pressure**: Robbers can use time as part of the negotiation and demand that certain conditions be met within a time limit, thereby forcing negotiators to respond. 7. **Seek media involvement**: If the situation allows, the robbers can try to use media attention to put pressure on the authorities and gain more room for negotiation. 8. **Show despair or fatigue**: Appropriately show despair about the current situation to make the negotiating party feel urgent and more likely to meet certain demands. 9. **Maintain moderate threats**: When necessary, the robbers can potentially show threats, but should try to control them as much as possible to avoid causing the situation to get out of control. 10. **Be prepared to accept compromise**: The robbers should be mentally prepared and understand that the negotiations may not fully meet their demands, so they are willing to make moderate compromises. These strategies do not necessarily guarantee the robbers' safe escape, but they provide some ideas that help increase the possibility of success. At the same time, negotiations in any situation are complex and unpredictable, and specific strategies should be flexibly adjusted according to the situation on the spot.