The "24 Turns" (25.821725°N, 105.202600°E), often mistaken for a segment of the Burma Road, is actually in Qinglong, Guizhou. During the Second Sino-Japanese War, the war supplies first arrived at Kunming by the Burma Road, then went through the "24 Turns" to arrive at Chongqing, the provisional capital, and reach the front-line troops.
Burmese and Chinese laborers using hand tools to build Burma Road
The road is 717 miles (1,154 km) long and runs through rough mountain country. The sections from Kunming to the Burmese border were built by 200,000 Burmese and Chinese laborers during the Second Sino-Japanese War in 1937 and completed by 1938. It had a role in World War II, when the British used the Burma Road to transport materiel to China before Japan was at war with the British. Supplies would be landed at Rangoon (now Yangon) and moved by rail to Lashio, where the road started in Burma. In 1940 the British government yielded to Japanese diplomatic pressure to close down the Burma Road to supplies to China for a period of three months. After the Japanese overran Burma in 1942, the Allies were forced to supply Chiang Kai-shek and the nationalist Chinese by air. They flew these supplies from airfields in Assam, India, over "the hump", the eastern end of the Himalaya uplift. At the insistence of the United States, and much to the chagrin of Winston Churchill, the wartime leader of Britain, British forces were given, as their primary goal in the war against Japan, the task of recapturing Burma and reopening land communication with China. Under British command Indian, British, Chinese, and American forces, the latter led by Vinegar Joe Stilwell, defeated a Japanese attempt to capture Assam and recaptured northern Burma. In this area they built a new road, the Ledo Road which ran from Ledo Assam, through Myitkyina and connected to the old Burma Road at Wandingzhen, Yunnan, China. The first trucks reached the Chinese frontier by this route on January 28, 1945. (Winston Churchill, The Second World War, v. VI, chap. 11.)