Chang Ji is an author about whom limited public information is available; details such as his courtesy name, place of origin, and official career cannot be confirmed. The library holds two of his works, the representative one being Aiyin Cao (also written as Ai Yin Cao), commonly classified under classical literature and classic works. Based on the available material, his writing consists mainly of traditional poetry and prose. The word yincao in the title suggests that the collection gathers lyrical and expressive pieces, likely in the vein of classical verse and prose. Because biographical clues about the author are scarce, the circulation and actual influence of his works are also difficult to examine in detail. Readers and researchers may consult prefaces, colophons, and related documents in the original editions for further verification. This introduction is based only on information confirmed within the library and offers no speculative additions.
