the Bell and Drum Towers, for its bar and nightlife offerings. While most of Beijing's major corporate buildings are located in the city's central business district in the Chaoyang District to Dongcheng's north and east, some are within the district. China National Petroleum Corporation and subsidiary PetroChina share one headquarters facility just inside the district at the Chaoyangmen intersection along the 2nd Ring Road. Air Koryo has an office in the Swissôtel Beijing in Dongcheng District. Beijing's current master plan designates Dongcheng as one of the city's four core zones. To enhance the district's combination of commercial and cultural attractions, it calls for giving priority to service and high-tech industries within it. Three areas in particular are singled out for attention—Wangfujing, the eastern portion of the 2nd Ring Road, and the High Technology Park near the Lama Temple at Yonghegong Road and the Ring Road. The plan also calls for the "preservation of the city's historic landscape and renovation of dilapidated houses." Tax credits are available to eligible businesses that generate at least a half a million renminbi in contributions in their first years of operation in the district. Administrative divisions The district contains 17 subdistricts: Transport Metro Dongcheng is currently served by nine metro lines of the Beijing Subway: - Tian'anmen East, Wangfujing , Dongdan , Jianguomen - Qianmen , Chongwenmen , Beijing Railway Station, Jianguomen , Chaoyangmen , Dongsi Shitiao, Dongzhimen , Yonghegong Lama Temple , Andingmen, Guloudajie - Hepingli Beijie, Yonghegong Lama Temple , Beixinqiao , Zhangzizhonglu, Dongsi , Dengshikou, Dongdan , Chongwenmen , Ciqikou , Tiantandongmen - Nanluoguxiang , Dongsi , Chaoyangmen - Zhushikou , Qiaowan, Ciqikou , Guangqumennei, Guangqumenwai - Andelibeijie, Guloudajie , Shichahai, Nanluoguxiang , Zhongguo Meishuguan (National Art Museum), Jinyu Hutong, Wangfujing , Qianmen , Zhushikou , Tianqiao, Yongdingmenwai , Muxiyuan - Dongzhimen - Yongdingmenwai , Jingtai - Dongzhimen , Beixinqiao Education Primary and secondary schools Throughout Dongcheng are many of Beijing's public schools. Some of its high schools have been added to the city's list of beacon high schools, those that consistently maintain high standards. Among them are Beijing No. 166 High School on Tongfu Alley just off Dengshikou Street, Beijing Huiwen Middle School on Peixin Street in the former Chongwen District and Beijing No. 5 High School on Xiguan Hutong east of Nanluogoxiang. Another secondary institution of note, Beijing Jingshan School, is also located on Dengshikou Road. on Chaoyangmen Inner Street.