Put the "PLAAF Blue Special (Fictional)" and "PLAAF Blue Camo (Fictional)" folders into
Saved Games/DCSWorld/Liveries/aircraft/J-11A
or
DCSWorld/CoreMods/aircraft/ChinaAssetPack/Liveries/J-11A


Put the files from the RoughMet folder into the main install of DCS:
DCSWorld/CoreMods/aircraft/ChinaAssetPack/Textures/J-11A
