H.R. 8683 requires the Secretaries of Defense and State to jointly develop and maintain a global map of strategically important ports and identify Chinese efforts to build or acquire them. Within 180 days of enactment, these officials must submit a comprehensive strategy to Congress for countering Chinese port expansion and ensuring that key ports remain under U.S. or allied control. The bill directs officials to analyze the military and commercial capabilities of Chinese-owned ports, assess ongoing and canceled Chinese port projects, and identify non-Chinese ports using Chinese infrastructure or vulnerable to Chinese cyber attacks. The legislation also establishes policy for federal agencies including the Export-Import Bank and U.S. International Development Finance Corporation to collaborate in blocking Chinese investment in strategic ports and report their progress to Congress. No specific funding amount is detailed in the bill text, though implementation would involve existing federal agencies and their development finance tools.