Creating gerber files for chinese pcb factories using kicad
In pcbnew click the File | Plot menu item. On the top left, I selected Gerber as Plot format. Moreover I had to check the B.Mask and F.Mask layers, as they were not checked by default. Everything else are the kicad defaults.
Kicad gerber export settings
Generate the files by clicking the Plot button on the bottom.
Kicad drill file settings
Generate the drill file by pressing the Drill File button on the right.