what wasn't well documented?
The existence of the early state of Shu
is it referred to anywhere?
yes
where?
in the Book of Documents
how is it seen?
as an ally of the Zhou
where was the cradle of the world?
the Yangtze region
beginning?
at least the 15th century BC
who was ruling then?
the Shang and Zhou dynasties
where?
in North Chin
what is discusses in very old documents?
Accounts of Shu
what was one source called?
the Chronicles of Huayang