During the 1950s, the People's Republic of China built a road connecting Xinjiang and western Tibet, of which ran south of the Johnson Line through the Aksai Chin region claimed by India. Aksai Chin was easily accessible from China, but for the Indians on the south side of the Karakoram, the mountain range proved to be a complication in their access to Aksai Chin. The Indians did not learn of the existence of the road until 1957, which was confirmed when the road was shown in Chinese maps published in 1958.