Cai Jing
Zhao Mingcheng started his civil service career in 1103, but was quickly involved in an imperial court power struggle between his father and the infamous politician Cai Jing. In 1107 he was arrested and brought to court by his political rivals but his case was soon closed for lack of evidence. After this episode he returned to his hometown of Zhucheng and started to focus on his systematic study of antiquities.