It is located between the Taipei Metro Red Line and eastern shore of the Tamsui River, and between Civic Boulevard and the Sun Yat-sen Freeway.[1] Taipei's commercial center has since shifted south east to Zhongzheng, Da'an and Xinyi, and Datong is far less important economically.During the Qing Dynasty, the district was named Daronpon (Chinese: 大浪泵; Pe̍h-ōe-jī: Tōa-lông-pōng), Paronpon, and other variants, but was renamed Toaliongtong (大隆同; Toā-liông-tông) in 1844.In 1946, the district's name was changed to Tatung (大同), which means "Great Unity", the Confucian notion of utopia which is in the lyrics of the National Anthem of the Republic of China.The district consists of Bao'an, Dayou, Guangneng, Guoqing, Guoshun, Jiangong, Jianming, Jiantai, Jingxing, Laoshi, Linjiang, Longhe, Minquan, Nanfang, Penglai, Shuanglian, Siwen, Xingming, Yangya, Yanping, Yongle, Yuquan, Zhaoyang, Zhisheng and Zhongqing Village.