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黄河是世界闻名的大河。它的源头在哪里,历来是中外人士所普遍关注的。从唐贞观九年(公元635年)开始,我国历代政府不断派员察勘河源。解放后,人民政
The Yellow River is a world famous river. Its source is always the focus of Chinese and foreigners. From Tang Zhenguan nine years (AD 635), our successive government officials sent to investigate Heyuan. After the liberation, people’s government