northward course along Jiugulou Street, which it follows north for several kilometers, past the 2nd Ring Road to Andeli Street North, where it turns west. At the street's end, the edge of Rendinghu Park, it follows the park edge to the northeast. The boundary turns east at Huangsi Street, following the rear property lines of buildings on the north side. It crosses the street again a block east of Gulou Outer Street, where it follows the northern edge of Liuyin Park. From the park's northeastern corner it goes due east to Andingmen Outer Street, where it turns north. It continues north across the 3rd Ring Road for a kilometer to Jian'an East Road, where it turns east, just south of Yuandadu Chengyuan Ruins Park. This is the district's northernmost section, now bordering on the Chaoyang District. After 500 m, it zigzags south, southeast and then west again along local streets to Shenggu Middle Road. There it turns south and crosses the Ring Road again, continuing on Xiaohangzhuang North Street. Another zigzag takes it along Xiaohangzhuang, Xinghua and Qingniangou roads to Heipingli East Street, where it turns south, to turn east again along Heiplingli North Street. At Jiaolin Alley it turns south again, following another irregular path through the neighborhoods here to just east of Minwang Hutong. At the river paralleling the Second Ring Road on its north, it turns east briefly to follow that, cross under the Airport Expressway along Xiangheyuan Middle Street. A short section detours north to take in some of the buildings on the north side of Xiangheyuan Road, after which it returns to what is now Xiangheyuan North Street. Turning southeast along Zuojiazhuang West Street, the boundary turns to follow the north bank of the Landmark River eastward at the Chunxiu Road intersection. The river bends to the east and then southeast, where a short tributary comes in 200 m west of Chunxiu. It follows that back to Chunxiu at its intersection with Dongzhimen Outer Street. Rejoining Chunxiu, the boundary stays with it for another to Beijing Workers' Stadium, where it becomes Workers' Stadium West Road, with Workers Indoor Arena on the east side. At Dongyingfang Hutong, it turns west again. Following Jishikou East Road north for a block, then turning west on Panjiapao Hutong, a brief northward turn at Dongzhong Street brings it back to the Second Ring Road via Fuhua Dasha South Street. From