Question: Who is the paternal grandfather of Li Chongjun?
Sentence (from "Li Chongjun"): He was made crown prince because the only son of his father's wife Empress Wei, Li Chongrun, had been killed before his father's return to the throne, but on account of his mother's low birth, he was often humiliated by Empress Wei's daughter Li Guo'er the Princess Anle and her husband Wu Chongxun (武崇訓).
Relevant evidence: No