J-6/B-6 Drones

J-6/B-6 with the cockpit completely removed

J-6/Mig-19 fighters

J-6/B-6s are seen carrying two 250kg bombs under the wings.

Around 200 retired J-6/Mig-19 fighters are thought to have been converted to UAVs as B-6 (J-6W?) drones. 
The aircraft had the wing-root 30mm guns, ejection seat and other life support systems removed. 
New remote flight control, navigational (GPS?) and fire control systems including datalink were installed. They are believed to have been stationed in Southeast China facing Taiwan (S/N 794xx). 
Some B-6s are seen carrying two 250kg bombs under the wings, suggesting their role as low-cost ground attack UCAVs, or as cruise missiles or decoys to probe, disrupt even suppress enemy air defence systems. 
Therefore the guidance system might include passive radar homing for anti-radiation missions. It was rumored that a further upgraded variant has been developed with the cockpit completely removed. Depending on the cost, B-6 could be modified to fly additional missions including ELINT, ECM and laying naval mines.