The statistics of the China natural gas industry prosperity index show that it reached 60.01 in the first quarter of 2018 (see Table 1 for details), which is a relatively prosperous state; the prosperity index of natural gas production enterprises reached 60.05, also a relatively prosperous state; the prosperity index of natural gas sales companies stood at 59.94, which is a generally prosperous state; and the prosperity trend index of the natural gas industry for the coming year was 73.90, a
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