The diversity of the international community is conducive to complementing each other's strengths. No matter whether the social systems are the same or different, they can and should learn from each other. The advantages of a civilization do not require coercion, and others will learn; on the other hand, if they are coerced, others will not want to Countries should also actively seek the convergence of interests and cooperate to solve common problems facing mankind. These areas of cooperation are very broad, such as sustainable development, pollution control, and anti-drug and terrorist activities. From this we can infer:. ['the differences in social systems between countries are increasing.', 'there are many common problems in countries with different social systems.', 'Diversity of the international community is the root cause of rampant terrorist activities.', 'one country cannot learn the weaknesses of another.']