The Jehol Diary (Yeolha Ilgi) is a work by the Joseon dynasty silhak scholar Bak Jiwon, written in classical Chinese.
Bak, also known by his pen name of Yeon'am (燕巖), made an extensive tour of what was then the northern territory of the Chinese Qing Empire, including Shenyang, Beijing and Rehe Province (formerly romanized as Jehol), in 1780, in the company of his cousin.
Bak's cousin had been dispatched to the Qing imperial court by the Joseon king Jeongjo to attend the 70th birthday celebrations of the Qianlong Emperor.
However, the scope of the diary is vast, covering such disparate topics as history, customs, natural surroundings, politics, economics, and poetry.
The chapter headings are as follows: Prologue (서 序) This is a 15-day record from the Yalu River, which shows interest in the welfare of the use of ligature and bricks.