China's capital city Beijing and economic hub Shanghai both realized nearly double-digit growth in 2010, showing powerful economic momentum.

Beijing generated nearly 1.37 trillion yuan (208 billion U.S. dollars) in gross domestic product (GDP) in 2010, up 10.2 percent year-on-year, according to the publicity office of the municipal government.

The growth was higher than what the city had originally expected, said Yu Xiuqin, spokeswoman of the office.

Beijing's import and export value hit 301.41 billion U.S. dollars last year, up 40.3 percent as against the previous year.

Shanghai's GDP grew 9.9 percent to hit nearly 1.69 trillion yuan last year, according to the city's bureau of statistics.

The Shanghai World Expo that ran from May 1 to Oct. 31 last year has helped boost economic growth.