北京唯佳长信工具有限公司(原北京唯佳五金工具厂)成产于1994年，专业从事研发生产“长信”牌电力施工机具。企业本着“服务电力行业，振兴民族工业”的精神，先后开发生产了棘轮式电缆剪、剥线钳、手动液压工具、电动液压工具、母线加工机具等一百多种规格的产品。随着客户要求的不断提高，加速并促进了企业生产技术的更新；随着企业的壮大，2008年成立了北京西岭工贸有限公司，专业生产研发电力施工机具。
企业坚持：以科技进步为动力，勇于创新，强化管理；以互利双赢为目标，拓展市场，诚信经营；以技术服务为根本，完善网络，稳步发展。
“长信”凭借独到的设计理念和精益求精的专业精神，在保留原技术要求的基础上注重效率与现代化生产相结合，生产制造的精品工具，经历多年市场实践的检验，深受国内外电力电信施工单位的欢迎。
Beijing Weijia Changxin Tools Co., LTD. (formerly Beijing Weijia Hardware Tools Factory) was founded in 1994, specializing in the development and production of "Changxin" brand electric power construction machinery. In the spirit of "serving the power industry, revitalize the national industry", the enterprise has developed and produced ratchet type cable scissors, wire strippers, manual hydraulic tools, electro-hydraulic tools, busbar processing machines and other more than 100 specifications of products. With the continuous improvement of customer requirements, accelerate and promote the enterprise production technology update; With the growth of the company, Beijing Xiling Industry and Trade Co., Ltd. was established in 2008, specializing in the production and development of electric power construction equipment.
Enterprises adhere to: scientific and technological progress as the driving force, innovation, strengthen management; To mutual benefit and win-win as the goal, expand the market, integrity management; Based on technical services, improve the network and develop steadily.
"Changxin" with the original design concept and the professional spirit of excellence, in the retention of the original technical requirements on the basis of the combination of efficiency and modern production, production of high-quality tools, after years of market practice test, well received by domestic and foreign power telecommunications construction units.
