Photos from the side of a jet surface on social media – with one big difference

Clear side-view photos, which emerged on Chinese social media on September 25, show a tailless fighter on a runway.

Chinese authorities have not confirmed the authenticity of the images.

One notable difference from earlier sightings is the absence of a nose-mounted air data boom, which had been visible in multiple test flights since the jet was first spotted flying in December.

The removal of the boom – a sensor used to collect precise information such as airspeed during test flights – could indicate an advancement in the programme, Chinese observers said.