"Four evils" for a long time. February 12, 1958, the CPC Central Committee, the State Council issued the "four pests hygiene instructions." To put in 10 years or less some time to complete elimination of flies, mosquitoes, rats, sparrows task. Gradually, the "Sparrow" is vindicated by the "bug" instead. After that, as a result of changes in social life flies off approach, "bug" and was "cockroaches" instead. So is now the "four evils" should be flies, mosquitoes, rats, cockroaches. Loss of food flies harm, destruction of grassland and forest, for example: the production of food in the world, 20% is to be eaten mice. ★ industry on rodents bite into the cable distribution room, drill water flies cause a short circuit transformer, causing blackouts. Huge economic losses. Of course we also have cockroaches hazards: chew food, damaged materials, contaminated food, and the spread of dysentery, typhoid, polio, adenovirus, viral hepatitis and other diseases. In addition, the food mildew can produce carcinogenic aflatoxin. Flies off approach, Fuzhou Shengwei (certified), flies by Fuzhou Shengwei Environmental Technology Limited. Environmental Technology Co., Ltd. Fuzhou Shengwei (www.fzsw.com.cn) is Fuzhou, insect terminator leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customers needs. Shengwei leadership in Fuzhou with the staff warmly welcome all inquiries negotiations to create Fuzhou Shengwei a better future.