 The spellings Yangtze and Yangtze Kiang was a compromise between the two methods adopted at the 1906 Imperial Postal Conference in Shanghai, which established postal romanization.Hanyu Pinyin was adopted by the PRC's First Congress in 1958, but it was not widely employed in English outside mainland China prior to the normalization of diplomatic relations between the United States and the PRC in 1979; since that time, the spelling Yangzi has also been used.The source and upper reaches of the Yangtze are located in ethnic Tibetan areas of Qinghai.