answer:President Trump demanded management changes, security guarantees, and a guarantee that ZTE will buy parts via U.S. Companies in exchange for selling parts to ZTE. President Xi reportedly reiterated that many jobs would be lost if the U.S. Refused to sell parts to ZTE. It is unclear how President Xi responded to Trump's specific demands.

answer:There is no official statement or evidence on why President Trump suspected China was behind Kim's change of heart. However, some experts speculate that China put pressure on North Korea to take a tough stance in negotiations due to the ongoing trade war with the US. Additionally, China is North Korea's biggest trading partner and has a significant influence on the country's economy and politics.

answer:According to Fox News, a "tentative" deal has been reached with China's President Xi over the giant Chinese telecoms company ZTE. Under the deal, Trump demanded management changes, security guarantees, and a guarantee that ZTE will buy parts via US companies in exchange for selling parts to ZTE. It is still unclear what specific management changes and security guarantees were demanded, but it is likely that they are related to ZTE's previous violation of US sanctions against Iran and North Korea. However, this deal is still tentative and has not been confirmed by either the US or Chinese government. It is also unclear how this potential deal will impact the ongoing trade negotiations between the US and China.

answer:Effective project management strategies require a comprehensive understanding of the various stages of the project life cycle, including planning, execution, team collaboration, risk management, monitoring and evaluation, and communication. One critical aspect is planning, which involves defining the project objectives and scope, identifying the resources, and developing a detailed project plan. A well-defined project plan should specify the project scope, objectives, timeline, budget, and deliverables, among other key factors. During execution, the project manager should strive to ensure that the project plan is adhered to, resources are allocated effectively, and project risks are managed. Effective team collaboration is vital and may involve establishing clear roles and responsibilities, encouraging teamwork and communication, addressing conflicts, and providing feedback. Risk management is a critical component of project management, and effective risk management strategies involve identifying, assessing, and mitigating risks that may adversely affect the project's progress. Monitoring and evaluation are also essential aspects, as they enable the project manager to measure progress, identify variances, and make appropriate adjustments. Effective communication is also crucial to project success and should involve regularly updating stakeholders and team members, addressing concerns, and promoting transparency. Best practices, theories, and frameworks in project management include Agile, Waterfall, Critical Path Method (CPM), and Gantt charts. For instance, Agile methodology emphasizes flexibility, adaptability, and collaboration, while the Waterfall model emphasizes the need for a clear plan and sequential execution. In conclusion, the keys to effective project management include planning, execution, team collaboration, risk management, monitoring and evaluation, and communication. By adhering to best practices and utilizing theories and frameworks, project managers can improve their chances of achieving success in various industries and contexts.