20 years ago , it was the first time of cas natural science approach to the study of chinese surnames distribution , they announced the classification of 100 common surnames , and this research brings the high concern of both the interior and overseas chinese 20年前，中科院的研究人员首次以自然科学的方法研究中国人的姓氏分布，公布了当时100家大姓的排序，引起海内外炎黄子孙的高度关注。
And those jinshi were mainly from only a few local leading families with superior tradition in culture and education , as well as solid economical power , which enabled their younger generations to be more competitive in the imperial examination 从姓氏分布来看，则是集中在少数几个大姓之中，这是因为这些大姓宗族拥有优越的文化教育环境和雄厚的经济实力，从而使其子弟具有较强的科举竞争力。
