As of the end of January, a total of 28 municipalities and provinces in China have released their 2011 economic data, China Business News (CBN) reported Monday.

Only Beijing, Shanghai and Zhejiang have an economic growth lower than the nation's average level. Tianjin and Chongqing both have the fastest economic growth, which stood at 16.4 percent in the past year.

According to statistics released by Tianjin, the city's GDP reached 1.12 trillion yuan ($176.69 billion) in 2011, narrowing the gap between it and Guangzhou (1.24 trillion yuan).

The provinces with faster development concentrated in the central and western part of China.

In 2011, Chongqing's GDP hit 1 trillion yuan, up 16.4 percent year-on-year. Sichuan province's GDP increased by 15 percent year-on-year to 2.10 trillion yuan.

Provinces of Shandong, Hainan and Yunnan have not released their data yet, CBN said.