Four thousand years ago, the ancient Indians already knew how to plant rice and cotton, while the Sumerians knew how to make decimal-based calculations, and the Egyptians engaged in constant conquests .... How did the people of the Lungshan Culture in China pass their days?
距今四千年前，古印度人已懂得種稻及棉花，兩河流域的蘇米爾人已懂得應用十進位計算，埃及人已征戰不休…… 我國龍山文化時期的人們，又如何過日子？