China is sparing no effort to meet its 11th Five Year Plan (2006-2010) energy-conservation goals, a senior official said Friday.

Xie Zhenhua, deputy minister of the National Development and Reform Commission (NDRC), the country's top economic planning agency, made the remarks quoting Premier Wen Jiabao, a statement posted on the NDRC website said.

According to the plan, China will cut its per unit of GDP energy consumption by 20 percent from 2005 levels by the end of 2010.

No matter how difficult it may be, the promise must not be broken, the statement said.

Data shows China's energy consumption per unit of GDP dropped 2.2 percent last year, failing to meet the annual target of 4 percent.

The NDRC called on companies to make greater efforts in the remaining six months of the year.

The NDRC will ask energy-intensive enterprises to shut down or curtail production.

The planner will promote energy-conserving industries with preferential policies, according to the statement.