Chen Lunjiong,styled himself Zizhai,was born in Tongan County, Fukian province during the reign of Emperors Kang Xi and Yong Zheng of the Qing Dynasty.His book the RECORDS HEARD AND SEEN FROM THE COASTAL COUNTRIES is a comprehensive work of the world geography written in our country in the 18th century.Rased on the records of what he had heard and seen, its content is comparatively reliable and indetail.It brings forth new ideas and content.It's of great practical significance to the teaching and researches of the coastal geography and world geography in our country. For the construction of our national defence as well as for the construction of our coastal ports,it is worthwhile researching and making full use of it.