Huawei Technologies Co. Ltd. is a Chinese multinational networking and telecommunications equipment and services company headquartered in Shenzhen, Guangdong. It is the largest telecommunications equipment manufacturer in the world, having overtaken Ericsson in 2012. Huawei was founded in 1987 by Ren Zhengfei, a former engineer in the People's Liberation Army. At the time of its establishment Huawei was focused on manufacturing phone switches, but has since expanded its business to include building telecommunications networks; providing operational and consulting services and equipment to enterprises inside and outside of China; and manufacturing communications devices for the consumer market. Huawei has over 170,000 employees as of September 2015, around 76,000 of whom are engaged in research and development (R&D).