历史街区应采用整体保护、真实共存、分级保护、适度整治更新的保护原则。
The principles of Historic districts's protection, include integrated protection, sincerity coexist, hierarchical protection, and apposite update.
保护区实行严格管理与适度开发相结合的原则。
The Reserve shall follow the principle of strict administration combined with moderate development.
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