Is “After helping Emperor Suzong suppress the rebellion, Li Mi requested to return and lived in seclusion on Mount Heng.” true?

The Old Book of Tang, Biography of Li Mi, records that Li Mi participated in military and state affairs, and later because 'soon the Zhongshu Ling Cui Yuan and the favored minister Li Fuguo, jealous of his abilities, plotted against him. Li Mi, fearing, requested to travel to Mount Heng. An imperial edict granted his request, providing him with a salary of the third rank, and he thus secluded himself on Mount Heng.' In the 96th chapter of Romance of the Sui and Tang Dynasties, it is written that Li Mi stated that his achievements were high and he was envied, and after remonstrating against further harming his own kin, he earnestly requested to return to the mountains. Emperor Suzong issued an edict allowing him to temporarily return, and 'Li Mi thanked the emperor that very day, resigned from court, and went to live in seclusion on Mount Heng.' His resignation and seclusion on Mount Heng are consistent with the official historical records.