ISLAMABAD (Online) - China has expressed keen interest in investing $2.5 billion in Pak-Iran gas pipeline project while Islamabad has also started talks with Beijing to purchase technical equipments to be used for laying down the pipeline. According to sources within the Petroleum Ministry, China is interested to see the project is extended to its territory and a delegation would visit Pakistan in the second week of next month to discuss these matters. After inclusion of China, Pakistan would get an amount of $200 to $500 million annually as transit fee. The sources maintained the talks were underway as Pakistan had raised no objection over inclusion of China in the gas pipeline project.