Xiāngchuán Zhōu Wénwáng zài bèi qiújìn shí tuīyǎn le 《 Zhōuyì 》.
Tradition says King Wen of Zhou worked out the Book of Changes while he was a prisoner.
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His personal name was 姬昌, and under the Shang he held the title 西伯, "Lord of the West". He brought 姜子牙 into his service, and Confucius praised him for still serving the Shang while he held two-thirds of the realm, 三分天下有其二.
