Hebei was formed in 1928, after the central government dissolved the province of Chih-li (直隸), which means "Directly Ruled (by the Imperial Court)". Beijing and Tianjin Municipalities, which border each other, were carved out of Hebei. The plains of Hebei were the home of Peking man, a group of Homo erectus that lived in the area around 200,000 to 700,000 years ago. Major cities are Shijiazhuang, Baoding, Tangshan, Qinhuangdao, Handan and Zhangjiakou. Hebei is planning to re-organise the administrative divisions with an addition of three new prefecture-level cities, all to be located adjacent to Beijing and named in regard to their position with respect to the national capital namely, Jingbei (京北市, meaning "North of Capital"), Jingnan (京南市, meaning "South of Capital") and Jingdong (京东市 meaning "East of Capital"). This area currently comprise the enclave situated between Beijing and Tianjin.