Longdian Sci-Tech Industrial Ltd. Shenzhen shekou longdian safety techology research Co., Ltd. Approved by fire department of national public security and registered in shenzhen industrial and commercial bureau, is a joint venture of shenzhen pengji longdian security products Co., Ltd. And tianjin shenda safe technology developing Co., Ltd. It's a comprehensive enterprise which is professional in fire-proof products researching, developing, designing, producing, selling and engineering installation. Its annual income is thirty-five million yuan.