In principle, the area of houses demolished and rebuilt for 1-3 people is controlled within 40-60 square meters; the per capita building area of households with more than 3 people is controlled between 13-18 square meters. Under the premise of cost saving, all the reconstructed houses must be qualified in main components, safe in structure, in line with the local seismic fortification standards, and have basic sanitary conditions such as separation of human and animal, entry of kitchen and bathroom.<br>
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