**Brief Introduction**

**I.
Main Contents**

Data in this chapter cover mainly energy
production, consumption, and composition; elasticity ratio of energy production
and consumption; overall balance sheet of energy and balance sheets by
different types of energy; consumption of energy by sector and by types of
energy; efficiency of energy processing and conversion; and the consumption of
energy for non-production uses. Since 2013, indicators like energy consumption
per unit of GDP and installed power-generating capacity are also included.

**II.
The Scope of Data**

The scope of data in this chapter is the
whole country.

**III.
Sources of Data**

Data in Table 9-1 are calculated on the
basis of statistics on output of energy products; data in Tables 9-14 and
9-15come from the Association of Power Generation Enterprises; and data in
other tables in this chapter are from the energy balance sheets over the years.

**IV.
Notes on Coverage and Compilation of Data**

(1) The data on production of primary energy
are the same as the corresponding data on output of energy products.

(2) The elasticity ratio of energy
production is calculated as the quotient of the growth rate of energy
production divided by the growth rate of GDP; and the elasticity ratio of
energy consumption is calculated as the quotient of the growth rate of energy
consumption divided by the growth rate of GDP.

(3) In the energy balance sheet, data on
imports and exports are from Customs statistics. The refueling by Chinese ships
and airplanes abroad is included in imports. The refueling by foreign ships and
airplanes in

(4) In the table on the efficiency of energy
conversion, the coefficient for the conversion of electric power into the
standard coal equivalent is calculated on the basis of the heat value
equivalent. One kilowatt is equal to

(5) Gross domestic product are calculated at constant prices.