China has made its position clear on relevant issues on multiple occasions, Mao said, noting that China always works for peace and the end of the conflict. The contract covers the purchase of between 300 and 400 man-portable air-defence systems (MANPADS), including China’s QW-12 and FN-16 missile systems, the sources said. Iran seeks to rebuild air defencesThe sources spoke on condition of anonymity because of the sensitivity of the matter. China and Iran explore alternative routesIran has invested heavily over the past two decades in missiles, drones and radar systems. The QW-12 and FN-16 are shoulder-fired, infrared-guided surface-to-air missile systems designed to engage low-flying aircraft, helicopters and drones.