Since China's reform and opening-up in 1978, China has broken boundaries among different administrative regions to form a number of closely-knit economic rims or belts, most notably, Pearl River Delta, Yangtze River Delta and the Bohai Rim.
These urban agglomerations, each centering on a core megacity, have become massive powerhouses for the country's rapid economic development. They have also simultaneously spurred the development of their surrounding areas. In the coming decades, they will remain the most dynamic economic regions in China.
China is constructing additional economic rims with city clusters at their core to promote coordinated regional development.
Northwest Economic Rim 西北经济圈
Xi'an, capital city of Shaanxi Province, in the Northwest Economic Rim [baidu.com]
In 2010, the 14th Investment and Trade Forum for Cooperation between eastern and western China attracted a total of US$6.96 billion in foreign investment. To boost the region's development, the central government has staged a series of sub-regional development plans since 2009 including the Guanzhong-Tianshui Economic Belt, Kashi and Horgos special economic zones, Lanzhou-Baiyin Economic Belt, Jiuquan-Jiayuguan-Hami Economic Belt and the Yili Economic Belt. China aims to also develop the "Silk Road" economic belt which links Central Asia and Europe.