Which districts in Beijing are mountainous areas?

The mountainous areas in Beijing include Fangshan District, Mentougou District, Huairou District and Yanqing County. In these areas, there are many towns and villages located in mountainous areas, such as Puwa Township, Dushi Township, Fozizhuang Township, Daanshan Township, Xiayunling Township, Shijiaying Township and Nanjiao Township in Fangshan District. Yanchi Town, Zhaitang Town, Qingshui Town and Miaofengshan Town in Mentougou District; Liulimiao Township, Baoshan Temple Township, Nianzi Township, Changshaoying Manchu Township and Labagoumen Manchu Township in Huairou District; Dazhangke Township, Liu Bin Fort Township, Xiang Ying Township and Pearl Spring Township in Yanqing County.