After achieving the imperial title, Ku was said to travel seasonally by riding a dragon in spring and summer, and a horse in autumn and winter.

According to the Lüshi Chunqiu, drums, bells, chimes, pipes, ocarinas, and flutes were all invented, on the orders of Ku, by his subordinate Youchui (有倕); Ku's lyrics had musical scores (titles were 九招 (jiuzhao),六列 (liule),六英 (liuying, meaning snowflake)) composed by his assistant Xianhei (咸黑); and by a further imperial command, a dance accompaniment was provided by a phoenix.

[11] Ku's son Xie, born miraculously to Jiandi after she swallowed the egg of a black bird, became the predynastic founder of the ruling family of the Shang dynasty.

Ku's son Houji, born miraculously to Jiang Yuan after she stepped in the footprint of a god, became a predynastic founder of the lineage of the Zhou dynasty.

It also states that Ku "was born with double rows of teeth, and had the wisdom of a sage", and that he "made blind men beat drums, and strike bells and sounding stones, at which phoenixes flapped their wings and gambolled".

[18] Samguk Sagi volume 28 — 三國史記 卷二十八 百濟本紀 第六  Chinese Wikisource has original text related to this article: 三國史記/卷28