The City Talent Retention Index 2020 observes 30 cities. It includes 17 indicators, which measure the performance of cities from six perspectives, including economic foundation, innovation potential, cultural openness, environmental conditions, social welfare, and public life.

Sort out the list of highly cited scientists from around the world, China, and Beijing in 2020, analyze the changes in their selection from 2014 to 2020, compare the selection of major provinces and cities such as China and the United States, Beijing, Shanghai, and Guangdong, and propose policy recommendations.

This study analyses the overall situation and development trend of global talent mobility, provides an in-depth analysis of Beijing's practices and problems in promoting international talent mobility, and then puts forward countermeasures and suggestions for building a global talent mobility governance system.