In the first part of this paper, the author analyzes the reaction of the global and regional communities after the USA's withdrawal from Afghanistan in 2021, and also discusses the impact on the stability plan in Afghanistan and Pakistan. The US withdrawal also brought a number of political realignments and security transformations along with economic modifications that resulted in a shift in many dynamics of the relations of Pakistan and China, and also India and Russia. Security threats and humanitarian crisis resulting from the withdrawal affect Afghanistan and place pressure on the country's foreign policy, which challenges Pakistan.. The research also shows that co-operation and withdrawal worked as a motive for both Pakistan and China to consolidate their regional power, but the situation in Afghanistan, which is characterized by insecurity, hinders the two nations when it comes to peace and development of their countries individually.