<Ul> <Li> Huiyuan (會 元, lit . "top conference examinee"), the gongshi who ranked first in national exam . </Li> </Ul> <Li> Huiyuan (會 元, lit . "top conference examinee"), the gongshi who ranked first in national exam . </Li> <Li> Jinshi (進士, lit . "advanced scholar"), a graduate who passed the triennial court exam . <Ul> <Li> Jinshi Jidi (進士 及 第, lit . "distinguished jinshi"), graduates ranked first class in the court exam, usually only the top three individuals were qualified for this title . <Ul> <Li> Zhuangyuan (狀元, lit . "top thesis author"), the jinshi who ranked first overall nationwide . </Li> <Li> Bangyan (榜眼, lit . "eyes positioned alongside"), the jinshi who ranked second overall just below zhuangyuan . </Li> <Li> Tanhua (探花, lit . "flower snatcher"), the jinshi ranked third overall . </Li> </Ul> </Li> <Li> Jinshi Chushen (進士 出身, lit . "jinshi background"), the graduates who ranked second class in court exam, ranking immediately after the tanhua . </Li> <Li> Tong Jinshi Chushen (同 進士 出身, lit . "along with jinshi background"), graduates ranked third class in the court exam . </Li> </Ul> </Li> <Ul> <Li> Jinshi Jidi (進士 及 第, lit . "distinguished jinshi"), graduates ranked first class in the court exam, usually only the top three individuals were qualified for this title . <Ul> <Li> Zhuangyuan (狀元, lit . "top thesis author"), the jinshi who ranked first overall nationwide . </Li> <Li> Bangyan (榜眼, lit . "eyes positioned alongside"), the jinshi who ranked second overall just below zhuangyuan . </Li> <Li> Tanhua (探花, lit . "flower snatcher"), the jinshi ranked third overall . </Li> </Ul> </Li> <Li> Jinshi Chushen (進士 出身, lit . "jinshi background"), the graduates who ranked second class in court exam, ranking immediately after the tanhua . </Li> <Li> Tong Jinshi Chushen (同 進士 出身, lit . "along with jinshi background"), graduates ranked third class in the court exam . </Li> </Ul>

Explain how the merit system of civil service was implemented during the han