ChinaKnowledge.de -
An Encyclopaedia on Chinese History and Literature
Tianqiuzi 田俅子 "Master Tian Qiu" was a Mohist treatise written during the Warring States period 戰國 (5th cent.-221 BCE) by Tian Qiu 田俅 (ca. 360－300) or Tian Jiu 田鳩, a native of the state of Qi 齊.
The imperial bibliography Yiwen zhi 藝文志 in the official dynastic history Hanshu 漢書 says that the Tianqiuzi included 3 chapters that were compiled earlier than the legalist book Hanfeizi 韓非子. The Tianqiuzi was already lost during the Tang 唐 (618-907).
The Qing-period 清 (1644-1911) scholar Sun Yirang 孫詒讓 (1848-1908) contradicted the categorization of the Tianqiuzi as a Mohist book because the author believed in omens and portents, which the more "scientific" Mohists basically renounced. Ma Guohan 馬國翰 (1794-1857) collected surviving fragments of the Tianqiuzi and published them in his series Yuhan shanfang yiji shu 玉函山房輯佚書.