7. Hangzhou 

Population: 9.8 million

Area: 16,847 square kilometers

An old Chinese saying goes: "Up in heaven there is paradise, down on earth there are Suzhou and Hangzhou." The capital city of Zhejiang province, Hangzhou has long-been famed for its historical sites and natural beauty.

Nowadays, it is home to the e-commerce and tech giant Alibaba and numerous high-tech enterprises, as well as being renowned for its startup environment and digital economy. According to the latest figures, the city's GDP reached 1350.9 billion yuan– nearly one quarter of the entire province. 

More migrants are choosing this prosperous city as their home. By the end of 2018, the city had over 9.8 million residents, with a registered population of 7.7 million.