Based on ordinary enameled flat copper conductor, in 1999, BETW successfully developed heat-bonding polyacetal enameled flat copper conductor and polyamide-imide enameled flat copper conductor, the temperature index of which is 180, and both have passed the new products identification of Hebei Province. In 2000, BETW developed semi-hard heat-bonding enameled flat copper conductor and passed new product identification of Hebei Province, also got a third-class award of new excellent product. In 2003,BTEW successfully developed polyamide-imide enameled flat copper conductor the temperature index of which is155. In 2005, our company has successively developed enameled high-temperature solidifying conductor. Now our company can produce all kinds of enameled conductor, the temperature index range of which is from 120 to 200, the technical level is in lead in China.