The two main companies responsible for China’s oil & gas activities are the China National Petroleum Corporation (CNPC) and SINOPEC. Their subsidiaries have filed registration documents in Iran, and acquired various contracts for the development of Iran’s oil & gas fields. Identified in 2006, the Kish gas field is Iran’s largest gas discovery in recent history, and ranks among the 20 largest in the world. Another CNPC company, Persia Technical Services Kish Limited, was established in Kish in 2013, according to a posting on the job search website Iran Talent. From the Azadegan Oil Fields to the Cayman Islands Tax Haven: CNPC InternationalInvestigations of international business registries show multiple CNPC subsidiaries, all based in different global tax havens, go by the name of CNPC International (CNPCI).