are: Busan, Daegu, Daejeon, Incheon, Gwangju, and Ulsan. Historically, these independent cities have been carved from the province that surrounds them. Consequently, they typically share a strong regional and cultural identity with the adjoining province(s). For instance, Gwangju, located at the center of Jeolla region, is heavily associated with the region. Seoul and Incheon are said to make up the National Capital Area along with the densely populated Gyeonggi that almost completely encompasses them. One interesting relic of the newer independent cities is that, in some cases, the government administrative buildings (docheong) of the provinces they were once a part of are still located within city boundaries, meaning that these provinces have capitals that are not within their borders. On 1 July 2012, Yeongi-gun, Chungcheongnam-do absorbed parts of Cheonan, Gongju and Cheongju, and became independent from Chungcheongnam-do as Sejong Special Self-governing City under the Special Act on the Installation of Sejong City. Currently, the population of Sejong Special Self-governing City is lower than that of the aforementioned metropolitan cities, but the population is increasing with the construction of a mixed-use administrative city. In 2006, the ruling party floated a proposal to eliminate all current province and independent-city borders. This plan would divide the entire republic into fifty or sixty city- or county-level administrations, similar to the system in Japan. The plan was intended to help reduce regional discrimination and animosity by eliminating provincial identity. Philippines Many major cities in the Philippines are independent cities, classified as either "highly urbanized" or "independent component" cities. These cities are administratively and legally not subject to a province, and thus do not share their tax revenues with any province. In practise, most cities outside of Metropolitan Manila are often still grouped with provinces that they were partitioned from for the sake of convenience and simplicity. The national government and its agencies serve these cities through sub-offices for each region, to which the cities are indirectly subject. There are 38 such cities, with 16 being located in Metro Manila (including the City of Manila, the national capital); eight in the rest of Luzon and its surrounding islands; seven in the Visayas island group; and seven in Mindanao and its surrounding islands. Vietnam Vietnam has five municipalities that are not part of any of the Vietnam's provinces. This includes Hanoi, the capital of Vietnam; and Ho Chi Minh City (Saigon), the most populous city of Vietnam.