Guangdong is to merge Foshan with four other cities to speed up urbanisation.
The State Council has approved plans to classify Nanhai, Shunde, Sanshui and Gaoming as part of Foshan, making it the third largest city in the province after Guangzhou and Shenzhen.
The new city, with an area of 3,813sq/km, will have a population of 3.35 million and a gross domestic product (GDP) of 107.85 billion yuan (HK$102.7 billion).
By comparison, Guangzhou's GDP is 258.7 billion yuan and Shenzhen's is 194.6 billion yuan.
'The decision by the State Council, provincial committee of the Communist Party of China and the provincial government reflects the economic and social development needs of Foshan,' state media quoted city mayor Liang Shaotang as saying.
'It is in line with the trend to speed up the urbanisation process and is favourable for the integration of resources in the area.'