Beijing zhonzhihecheng technology co., ltd. is one of the high-tech manufacturers in the global security industry, specializing in residential, community, building intercom solutions and intelligent management solutions.Since 2006, we have been cooperating with European high technology in r&d, design and manufacturing.Zhong-zhi-he-cheng company has a r&d team of 30 people, 350 skilled staff, always committed to providing customers with high-quality products.At present, 80% of our products are sold to 63 overseas countries and regions.More than 5 million users are enjoying our products and services.Our products are manufactured in strict accordance with ISO 9001:2008 quality management system.Products have passed FCC, CE, RoHS certification.We always follow the principle of "technological progress, quality first, customer advantage".Zhihe presents, is always your professional and reliable security solutions partner!