The Burma Road was a highway extending about 1,100 kilometres (680 mi) through mountainous terrain from Lashio, northeast Burma northeastward to Kunming, China. Undertaken by the Chinese after the start of the Sino-Japanese War in 1937 and completed in 1938, it was a vital transportation route for wartime supplies to the Chinese government from Rangoon and shipped by railroad to Lashio from 1938 to 1946. An extension runs east through China from Kunming, then north to Chongqing.