There are two facts better to know, I'm a freshman for birds photography and not so many birds in Guilin. If you're a bird lover, and will stay at least 4 days in Guilin area, try your luck with me, let's search and shoot birds in countryside.
Here are some camera setting tips for bird photography:
Camera mode: Aperture Priority with aperture set to maximum aperture (wide open).
Metering: "Spot Metering" (a single dot).
Auto-focus: High Speed Continuous Mode (set to "C" in front of the camera and to "CH" on the camera dial), AF Area Mode Selector set to the middle selection (cross-hair).
Birds in Guilin
I used Nikon D810 with a lens 200-500mm F/5.6. Mostly, birds are about 3-5 meters distant from me. So your lenses shouldn't be shorter than 500mm, or you'd better to get a 1.4x teleconverter.