Yan Shigu was a Tang-dynasty scholar known for his work in annotation and textual criticism. Publicly available information about his life is limited, and his birth and death years, native place, and official career are not reliably recorded, so no conjecture is offered here. Two works are held in the collection under his name, Daye Shiyi Ji and Sui Yilu, both of which deal with events and anecdotes of the Sui dynasty and have the character of supplements to the historical record. They can be regarded as auxiliary material for later readers seeking to understand the figures and events of the late Sui period. In subject matter such works fall between historical biography and note-form writing: the narrative is concise, with emphasis on events and on the words and deeds of persons, and with little extended discussion. They are often classified under literary appreciation and Eastern philosophy, indicating that readers approach them both for their prose style and for their value as historical sources. Overall, Yan Shigu's name is tied to the works transmitted under it, and their value lies chiefly in preserving and retelling old Sui anecdotes, offering a reference text for researchers and general readers alike.
