China's problems with affirmative action, recruiting low income and geographically diverse kids

Interestingly, during the heyday of the Imperial Chinese Civil Service Examination system, the 3 provinces with the most examinees who succeeded in passing all 3 main levels of the examinations(locality, provincial, and national levels) consistently with high scores were Guangdong, Zhejiang, and Jiangsu. Seems like some of this carries over to the present day and probably accounts for set-asides for Beijing/Shanghai area residents.