In 1900, Bai Xihe, a small businessman in Xuchang County, accidentally met a German businessman. The German businessman proposed to exchange "sewing needles for human hair", the free trade was fed to his mouth, and Bai Xihe mobilized the whole village to "look for hair and change needles." The German businessmen did not expect that after laying the groundwork for a hundred years, Xuchang dominated the worldwide wig business.