Qingyuan emphasizes on scrap metal sorting and disassembling. In Shijiao and Longtang, 22 out of 36 villages over 1,300 families are engaging in scrap metal dismantling industry. Annual output of secondary resources is over 1 million tons and production value is up to 18 billion yuan. After two decade of development, Qingyuan Secondary Resource Distributing Center has take up a comparatively large share in China market. Output secondary copper in Qingyuan, which counting for one sixth of the whole country, have a great effect on the international copper market.