China has revised its energy intensity reduction levels for the years between 2006 and 2009, the National Bureau of Statistics said on its website Thursday.

The revision appears to have brought the country closer to achieving its target of a 20% reduction in energy intensity in the five years ending 2010. Energy intensity is defined as energy consumption per unit of gross domestic product.

China lowered energy intensity by 3.61%, 5.2%, 5.04% and 2.74% in 2009, 2008, 2007 and 2006, respectively, compared with levels reported previously of 2.2%, 4.6%, 3.66% and 1.79%, the NBS said.

After the revision, energy intensity in 2009 was put at 1.077 metric tons of coal equivalent per CNY10,000 ($1,475) of GDP.

Premier Wen Jiabao said in May the government will use an "iron hand" to ensure the 20% target will be reached by the end of this year after the nation's energy intensity rose 3.2% in the first quarter from a year earlier, due to a recovering economy, reversing the trend of steady declines in previous years.

Later, the National Development and Reform Commission scrapped preferential power tariffs offered to big consumers of energy in some regions, and raised the tariffs for some energy-intensive sectors including aluminum, ferroalloy, steel and cement.

The National Bureau of Statistics said Thursday that in the second quarter of 2010 GDP rose 10.3% from a year earlier, down from 11.9% in the first quarter.