jīng wèi fēn míng
as rivers Jing and Wei separate clearly (idiom)
to be entirely different
泾
jīng
Jing River
渭
wèi
the Wei River in Shaanxi through the Guanzhong Plain 關中平原|关中平原[Guan1 zhong1 Ping2 yuan2]
分
fēn
to divide; to separate
明
míng
bright