To implement the most stringent land conservation system, strictly control the total scale of construction land in urban and rural areas.

实行最严格的节约用地制度，从严控制城乡建设用地总规模。

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Oxman estimates that making concrete columns this way with low-density porous concrete in the center could reduce the amount of concrete needed by more than 10 percent, a significant savings on the scale of a construction project.

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It said large scale construction projects of any type require years of planning and preparation, even those that are, quote, "on the shelf" generally cannot be undertaken quickly enough to provide timely stimulus to the economy.

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Yet giant industrial bases of massive scale are under construction.

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