Today, 43 years ago, on May 31, 1982 (Lunar Calendar, April 9, 1982), Yang Unconn walked to explore the Yellow River. On May 31, 1982, Yang Unconn, a geologist from China, walked to the Yellow River after exploring the entire course of the Yellow River and arrived at the entrance of the Yellow River. Yang Unconn walked to explore the Yellow River from the origin of the Yellow River from July 21, 1981, lasting 315 days, traveling more than 5,500 kilometers, passing through 7 provinces, 2 autonomous districts and 108 counties, gathering a large amount of first-hand information about the Yellow River.