JF-17 Thunder was spotted with an unknown Pod. There are no details available yet. This could be a targetting pod, ECM or even an IRST pod. During the flight, the JF-17 was being used as a chase-plane for China's 5th generation stealth aircraft J-20, so it might just have been a camera.
AVIC and PAC are working on a two-seat version of JF-17 Thunder. The two-seat version will be used for conversion training and can also be adapted for combat roles. The development is not at the stage where the deliveries can be made.
The single seat version was designed in such a way that a two-seat version could later be adapted.