The official MV for Gong Gong With Headache 宦官偏头痛 gong gong pian tou tong is out on JVR's youtube channel!
It's totally irreverent and hilarious, combining elements of hiphop and ancient China, with Jay mashing everything up in typical DIAO fashion.
Here's the link to the JCS article about this MV:
And the MV:
And the BTS of the MV:
To end, here's a cute cartoon which is quite self-explanatory, if one knows what a eunuch is... ;)