*I am not sure how recent this is* Saw this on another forum
PLAAF Su-30MKK was photographed with the new Chinese KG600 Self-Protection Jamming Pod. In addition to its original Russian Sorbtsiya/Gardeniya ECM pods.
KG-600 first shown during the Zhuhai Airshow in 2014, it seems to be a successor of some sort to the KG-300G, which was exported to Pakistan along with the JF-17. On the other hand, as we can see, the KG-300G was still being offered at that time, termed to be a "smart jammer".
According to some, integration of this new pod proves one of the two:
1- China had access to Su-30MKK source code since day 1
2- Chinese Engineers managed to crack Su-30MKK source code
KG600 have also been spotted under JH-7A et H-6M.