. The charging standard of pro-Zhongyu gas ladder is: the annual gas consumption of the first step is below 300 cubic meters (inclusive), and the gas price is reduced from the current 2. 00 yuan/cubic meter is adjusted to 2. 30 yuan/m3; The annual gas consumption of the second step is 300~420 cubic meters (inclusive), and the gas price is 2. 40 yuan /m3 is adjusted to 2. 76 yuan/m3; The annual gas consumption of the third step is more than 420 cubic meters, and the gas price is 3. 00 yuan/cubic meter is adjusted to 3. 45 yuan /m3 gas is the general name of gas fuel, which can give off heat for urban residents and industrial enterprises. There are many kinds of gas, mainly natural gas, artificial gas, liquefied petroleum gas, biogas and coal-based gas. Gas has obvious economy, the country pays more and more attention to environmental protection, and the market demand for clean energy continues to grow. As a clean, efficient and cheap energy, natural gas consumption is developing rapidly.