华南 generally covers Guangdong, Guangxi, Hainan, and sometimes Hong Kong and Macau — roughly the lands south of the Nanling mountains. The regional prefix
华 (short for
中华) groups Chinese macroregions:
华北,
华东,
华南,
华中,
华西,
华北. These show up in institution names like
华南师大 and weather reports.