Introduction to the Yunnan-Vietnam Railway: The Yunnan-Vietnam Railway, also known as the Kunhe Railway, has a total length of 854 kilometers and is a trunk line connecting China to Vietnam. Construction of the railway started in October 1903 and was officially opened to traffic in January 1910. It spans the three major river systems of the Jinsha River, the Pearl River, and the Red River. It has three major climate zones: the subtropical plateau monsoon climate with distinct dry and wet conditions, the south subtropical semi-humid climate, and the tropical mountain monsoon rainforest humid climate. , and 12 ethnic minority inhabited areas, which enabled Yunnan people to see the dawn of modern Western industrial civilization and promoted the process of modern civilization in Yunnan; it also recorded the history of French colonial oppression and the Chinese people's resistance to oppression, and the revolutionary pioneers on the road to republic A grueling struggle.