清华简 (清華簡) Qīnghuá jiǎn

Qīnghuá jiǎn proper noun Tsinghua Bamboo Slips
Domain: History 历史 , Subdomain: China
Notes: A set of Chinese texts dating to the Warring States period, some of which are similar to the 尚書 ” Book of Documents” (Wikipedia '清華簡')