China assures Pakistan of closer economic ties, support on efforts to defend 'territorial integrity'. China has reaffirmed its commitment to stronger economic ties with Pakistan and support for its efforts to defend territorial integrity. Chinese Foreign Vice-Minister Sun Weidong, during a visit to Pakistan, pledged cooperation following recent border tensions with Iran. Sun's discussions with Pakistani leaders and military chiefs focused on reinforcing the China-Pakistan Economic Corridor (CPEC) and addressing regional security concerns.