Well here's some info"Subsequent upgrades will be made on PAF JF-17s approximately every five years. Planned additions include:
Greater use of composite materials in the airframe to decrease weight.
Chinese Infra-Red Search and Track (IRST) system, possibly the Type Hongguang-I Electro-optical radar originally developed for the Chengdu J-10 fighter by Sichuan Changhong Electric Appliance Corporation. JF-17 is already compatible with this system but currently it must be carried externally in a pod mounted on one of the hardpoints.
New engine; most likely the Chinese WS-13 TianShan, although the PAF is considering fitting European powerplants such as the French Snecma M88 to its aircraft.
Minor airframe modifications to reduce the aircraft's radar cross-section by adding stealthy features.
Beyond the initial 50 PAF JF-17s, the remaining production aircraft may also be equipped with European avionics, radars and weaponry. Pakistan had begun negotiations with British and Italian defence firms over potential avionics and radars for JF-17 during initial development. Some of the radar options for JF-17 are the Italian Galileo Avionica Grifo S7,[23] and the French Thomson-CSF RC400, a variant of the RDY-2 radar, along with the MBDA MICA short/medium range air-to-air missile,also maybe 2 additional hardpoints