Present at the joint working group meeting, Hashmi revealed that both sides expressed satisfaction at the pace of progress that is being achieved on CPEC as a whole and Pakistan and China welcome the third-party participation in line with CPEC's spirit of economic collaboration, shared prosperity and shared gains.
Both sides have agreed to extend the CPEC into third parties, the ambassador said, noting that other workable areas could include mining, agriculture and information technology. The special economic zone can be a platform through which the third-party investment could come in, said the envoy, noting that more efforts will be made to ensure the security and safety of Chinese personnel and projects.
The highlighted texts seems not limted to any specific countries (Afghanistan and Iran). Especially the "third-party investment" could mean Gulf countries.