The accounting firm PricewaterhouseCoopers and China Development Research Foundation have collaborated since 2014 in selecting cities in China as samples for further comprehensive comparison and study.
Beijing, Shanghai and Shenzhen are the top three cities on the 2017 China Integrated City Index, which analyzed and evaluated 297 Chinese cities based on three main dimensions-society, economy and environment.
As one of China's four municipalities directly under the Central Government, Tianjin is the largest port city in Northern China.