In 1911 the Xinhai Revolution resulted in power shifts in China, and by the end of World War I, the British officially used the Johnson Line. They took no steps to establish outposts or assert control on the ground. According to Neville Maxwell, the British had used as many as 11 different boundary lines in the region, as their claims shifted with the political situation. From 1917 to 1933, the Postal Atlas of China, published by the Government of China in Peking had shown the boundary in Aksai Chin as per the Johnson line, which runs along the Kunlun mountains. The Peking University Atlas, published in 1925, also put the Aksai Chin in India. Upon independence in 1947, the government of India used the Johnson Line as the basis for its official boundary in the west, which included the Aksai Chin. On 1 July 1954, India's first Prime Minister Jawaharlal Nehru definitively stated the Indian position, claiming that Aksai Chin had been part of the Indian Ladakh region for centuries, and that the border (as defined by the Johnson Line) was non-negotiable. According to George N. Patterson, when the Indian government finally produced a report detailing the alleged proof of India's claims to the disputed area, the quality of the Indian evidence was very poor, including some very dubious sources indeed.: