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How to divide southern Anhui, central Anhui and northern Anhui?
Legal analysis: Northern Anhui refers to the area north of Huaihe River in Anhui, including Suzhou, Huaibei, Bengbu, Fuyang, Huainan and Bozhou. Anhui refers to the area north of the Yangtze River and south of the Huaihe River in Anhui Province, including Hefei, Lu 'an, Chuzhou and Anqing. Southern Anhui refers to the area south of the Yangtze River in Anhui Province, including Huangshan, Wuhu, Maanshan, Tongling, Xuancheng and Chizhou.

Legal basis: Article 10 of the Surveying and Mapping Law of People's Republic of China (PRC) establishes a national unified geodetic coordinate system, plane coordinate system, height system, geocentric coordinate system and gravity measurement system, and determines the national geodetic grade and accuracy, as well as the series and basic accuracy of national basic scale maps. Specific specifications and requirements shall be formulated by the competent department of Surveying and Mapping Geographic Information of the State Council in conjunction with other relevant departments and military surveying and mapping departments of the State Council.

Article 38 The compilation, publication, exhibition, publication and updating of maps shall conform to the relevant national standards for map compilation, map content expression and map examination. Internet map service providers should use maps approved according to law, establish a map data security management system, take security measures, strengthen the verification of new contents of Internet maps, and improve service quality. The competent department of surveying and mapping geographic information of the people's government at or above the county level, the network information department and other relevant departments shall strengthen the supervision and management of map compilation, publication, display, posting and Internet map services, ensure the quality of maps, and safeguard national sovereignty, security and interests. Specific measures for map management shall be formulated by the State Council.