Buildings from design to completed using Qian of stage about for 4-5 years, phase more Yu operating using stage average maintenance years as based Shi phase compared Yu buildings life cycle roughly for 2.6 times times, so for buildings and the facilities equipment of repair category or update of cycle, and the input of costs almost estimated, which should consider inflation, and loan interest rate, and construction material adjustment, factors, according to to provision 30 or 50 long-term repair budget and the advance developed repair Fund needs plans.
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