At the age of 83, Zhu Kezhen published a preliminary study on climate change in China in the last five thousand years in the L issue of the Journal of Archaeology 1972, which was later reprinted in China Science 1973 16, No.2 and June 1973. The full text is more than 5,000 words, but it brings together the achievements of Mr. Zhu Kezhen's lifelong research, which can be described as the representative work of his academic career. This research, extensive and profound, rigorous and meticulous, has set a brilliant example for the academic community and has been highly praised by scholars at home and abroad. The paper contains a large number of records of ancient books and local chronicles, which are widely quoted and respected by historians and historical geographers, and have played a great guiding role in historians' research-almost any article on the historical geography of China or the history of China's environment and material civilization will be placed in the references.