In June 2005, US-based Hong Kong ad-venturer Wong How Man led 23 international scientists to the southern Tibetan Plateau to trace the source of the Yangtze River. After two weeks and numerous setbacks along the way, they finally found a new source at 5,170 meters above sea level in southwest Zadoi County, Qinghai Province. It is 6.5 kilometers further in than the one officially acknowledged by the mainland Chinese authorities.
2005 年 6 月初，香港旅美探險家黃效文，號召 23 位國際科學家前往西藏高原南緣尋找長江新源頭，一路波折不斷，終於兩星期後，在標高 5,170 公尺的青海雜多縣西南面，找到比中國官方所發佈的還長了 6.5 公里的新源頭。