A study on the form of historical and cultural districts from the perspective of Conzenian School: as the Shengjin Town District in Nanchang City for an example

The protection of cultural relics and historic sites in my country began in the 1920s. In 1982, the State CounciI announced the first batch of 24 national historical and culturaI cities. In 1986, the State Council announced the second batch of historical and cultural cities to clearly protect historical districts (Gu,2003), according to my country The current policy standards divide the protection of historicaI and culturaI heritage into three IeveIs, namely: culturaI relics protection units, historical and cultural blocks, and historical and cultural cities (Wang, 2004 ). As a medium-scale cuIturaI heritage protection system, historicaI cultural blocks have gradually become a hot spot due to their relative culturaI integrity and operabiIity on scales, and multi-dimensionaI and comprehensive research has been launched (Dai et a I., 2012 ). In 2011, the People's Government of Jiangxi Province approved the three historicaI and culturaI districts including longevity PaIace (Wanshou PaIace), Shengjin Tower and jinxiancang Historic District in the protection plan for the famous historicaI and culturaI city of Nanchang. "The Nanchang Metropolitan Area Plan (2015-2030) was annouced in 2016" pointed out that the "One City, Three Streets, Four" historical and cultural blocks and historical features of Nanchang City should be protected. In 2017, the "Shengjin Tower Historical and CulturaI Block Protection Plan (2015-2020)" was proposed for the construction of the planned area. The land is changed to commerciaI land for unified commerciaI development. In the process of urban replacement, historical and cultural blocks are inevitably destroyed, leading to the loss of traditional style and existing historical structure. Conzenian School of Urban Morphology is used to study the historicaI and cultural blocks of Shengjin Tower and analyze its historical causes. The protection and re new a I have median level research significance.