Jf block 3 per other forum posting has semi submerged launchers like on f/18 and f-14 f-8 as in the pic below
??
report also confirmed a number of changes in the third batch of improvements made to the Fierce Dragon. Due to the need to use the new radar (which is expected to be the KLJ-7A active phased array radar developed by China) and new avionics, including the new EW system, the third Lot within a lot of changes. The report pointed out that "the orientation of the cockpit ventilation pipe was changed", and it was very difficult to carry out many tackling problems in this regard. In the end, it repeatedly overthrown the control, structure and strength and finally completed this major improvement.
In addition, the report points to changes in several radio transmitting equipment that may be related to the new electronic warfare system. The report pointed out that after research, to achieve launchers without bulging radome. This is a major breakthrough. In the past, radio transmitters were generally required to be exposed outside the fuselage in order to ensure effective transceiver.
The "buried" fuselage launcher is one of the technical characteristics of the fifth generation fighter in recent years, which is conducive to stealth, Reduce drag and simplify maintenance and repair work.
Or it may be just equipment is not in a bulge ?? Who knows like rwr etc ??