Facing the development of historic blocks, the dialectical relationship between protection and renewal is an eternal topic. It is necessary to protect historic districts and old buildings by multiple means, but how to choose the entry point of renewal is the key to the success of the renewal of historic districts. The correct entry point can make the historic district not only stay on the level of protection, but also give full play to the maximum potential of its history and tradition, making it the biggest driving force and ultimate beneficiary of the renewal and transformation of the historic district.