Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Classical Gardens of Suzhou' has mentioned 'Buffer zone' in the following places:
Occurrence Sentence Text Source
Within the borders of the buffer zone, essential elements including rivers, streets, alleys, vernacular residences as well as a cultural atmosphere, all have been preserved.
Management and Protection Regulations of Suzhou Garden and the Conservation Plan for the World Heritage Classical Gardens of Suzhou have been issued, in which the property area and buffer zone are clearly defined.
All measures serve a common purpose: to minimize the impact of urbanization by strictly monitoring and supervising various factors that could potentially affect these gardens, including through regulating approved procedures for construction projects within the buffer zone; reducing population density; improving living conditions and heritage awareness of residents around the area, and mitigating the pressures that arise from commercial activities and tourism.