This famous saying emphasizes the reality that countries are interconnected and interdependent. No country can solve all problems in isolation. In today's world, countries are facing the same challenges, such as climate change, trade disputes and terrorism. These problems transcend national boundaries and require the concerted efforts of the international community. Cooperation between countries is not only to realize their own interests, but also to achieve global stability and prosperity. Through cooperation, countries can share experiences, resources and technologies, meet challenges and promote economic development and social progress.