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China Construction First Group workers use a spirit level at an indoor basketball stadium in the Tibet autonomous region. [Photo/Xinhua]

China Petrochemical Corp, the country's largest oil refiner, vows to further step up its involvement in the biofuel market by continuing its B5 biodiesel project in Shanghai while accelerating research on B10 biodiesel.

China aims to further lower businesses' electricity costs by 10 percent by the end this year, according to the Government Work Report.

China National Petroleum Corporation, the country's largest oil and gas producer by annual output, will sell licensed products for the Beijing 2022 Winter Olympics at its retail stores in Beijing, Hebei, the Inner Mongolia autonomous region, Jilin and Liaoning.

China Eastern is also ramping up efforts overseas, with focus on Europe, the Americas, Oceania, Japan, South Korea and Southeast Asia this year.