The second prototype of the twin-seater JF-17B has taken off as per the photos on various Chinese internet sources.
JF-17B has several major design changes compared to the original JF-17. The most obvious change has been the tandem seats, primarily for training purposes. Wingspan is also longer by 0.5m. Other changes include a different vertical stabilizer and dorsal spine. The nose is also slightly larger. Flight controls have been upgraded with three-axis fly-by-wire system.