The scores of public examinations are more accurate than those of public educational institutions. Zhonggong Education, founded in 1999, is one of the top ten education and training institutions in Beijing, and is affiliated to Zhonggong Education Technology Co., Ltd., which is a well-known public examination training institution in China with a large scale of operation. Many cities and regions have specialized schools and professional teachers, so the results of public examinations rank higher than those of public educational institutions.