Prime Tortoise of the Record Bureau

Cefu Yuangui
Traditional Chinese
Simplified Chinese
Literal meaning	Prime Tortoise of the Book Department
Transcriptions Standard Mandarin Hanyu Pinyin Cèfǔ Yuánguī

Transcriptions
Standard Mandarin
Hanyu Pinyin	Cèfǔ Yuánguī

Cefu Yuangui was the largest leishu (encyclopedia) compiled during the Chinese Song Dynasty (AD 960–1279). It was the last of the Four Great Books of Song, the previous three encyclopedias published in the 10th century.

English titles for this encyclopedia are

The encyclopedia was originally named Narrative of Monarchs and Officials in the Past Dynasties but was later renamed to Yuangui, meaning the oracle tortoise shells, and Cefu, the imperial's storehouse of literature. The work was started in 1005 and finished in 1013 by Wang Qinruo and numerous other scholars. It was one of the four books that were divided into 1,000 volumes. It was almost twice as large as the Imperial Reader of the Taiping Era and was ranked second in the Siku Quanshu collections. It consisted of about 9.4 million words (or Chinese characters), which included many political essays, biographies of rulers and subjects, memorials, and decrees.

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