Hong Hao is the author of the two works Songmo Jiwen and Songmo Jiwen (variant title). Public information about his nationality, dates of birth and death, English name, and biographical career is limited. Judging from the extant works, his writings concern observations and records of the northern frontier regions, and they are often classified under Eastern philosophy. The two titles are very similar, possibly representing different editions or title forms of the same work, which reflects the multiple ways the book was presented as it circulated. Hong Hao's texts are mainly in the jottings-of-hearsay genre, emphasizing faithful records of what he observed and heard, in a plain style. They provide useful reference material for later generations seeking to understand the history, customs, and thought of the relevant regions. Although his output is small in number, his works have attracted attention for their distinctive subject matter and occupy a place in the literature of Eastern philosophy and frontier records.
