Editing Yin and yang (section)

=== Toponymy ===
Many Chinese place names or [[toponyms]] contain the word ''yang'' 'sunny side', and a few contain ''yin'' 'shady side'. In China, as elsewhere in the [[Northern Hemisphere]], sunlight comes predominantly from the south, and thus the south face of a mountain or the north bank of a river will receive more direct sunlight than the opposite side. ''Yang'' refers to the "south side of a hill" in [[Hengyang]] {{lang|zh|衡陽}}, which is south of [[Mount Heng (Hunan)|Mount Heng]] {{lang|zh|衡山}} in [[Hunan]], and to the "north bank of a river" in [[Luoyang]] {{lang|zh-hant|洛陽}}, which is located north of the [[Luo River (Henan)|Luo River]] {{lang|zh|洛河}} in [[Henan]]. Similarly, ''yin'' refers to "north side of a hill" in [[Huayin]] {{lang|zh-hant|華陰}}, which is north of [[Mount Hua]] {{lang|zh-hant|華山}} in [[Shaanxi]] province.* {{cite book |first=Zhuqing |last=Li |chapter=Chinese Place Names |pages=179–180 |editor-last=Jiao |editor-first=Liwei |title=The Routledge Handbook of Chinese Language and Culture |publisher=Routledge |year=2024 |isbn=978-1-315-16780-0}}

In Japan, the characters are used in western [[Honshu]] to delineate the north-side [[San'in region]] {{lang|ja|山陰}} from the south-side [[San'yō region]] {{lang|ja|山陽}}, separated by the [[Chūgoku Mountains]] {{lang|ja|中国山地}}.