The top-up limit of Lanzhou Gas is divided into two types.
One is for cooking, boiling water and other domestic gas, domestic gas regulations per household can only be topped up more than 400 cubic meters per year.
The other is heating gas, heating gas company regulations per household can only top up 2000 cubic meters per year.
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Residents who do not use natural gas for heating can buy 360 cubic days of gas a year.
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Residents who use natural gas for heating can buy 1,800 cubic meters of natural gas a year. As for how much natural gas each household buys at a time, residents can buy it at one time or twice according to their needs.