What happened in the era of Liu Yilong, Emperor Wen of Song Dynasty in the Southern Dynasty?

Liu Yilong, Emperor Wen of the Song Dynasty in the Southern Dynasty, let me know that the "Three Pei's of Historiography" appeared during this historical period. They were Pei Songzhi, Pei Peng, and Pei Ziye's ancestors and grandsons. Pei Songzhi, a famous historian in the Southern Dynasties and Song Dynasty, wrote annotations for "Three Kingdoms". "Three Kingdoms Annotation" is an important historical work in ancient my country and an indispensable part of Chen Shou's "Three Kingdoms". It is closely related to the Northern Wei Dynasty Li Daoyuan's "Shui Jing Annotation", the Southern Dynasty Liang Liu Xiaobiao's "Shi Shuo Xin Yu Annotation", and the Tang Li Shan's "Selected Annotation of Wen Xuan" "Combined into the "Four Famous Notes", it became the first of the "Four Famous Notes" in ancient China. Pei Peng, the son of Pei Song, was an outstanding historian in ancient times and annotated "Historical Records". He compiled 130 volumes of "Anthology of Historical Records", which provided a wealth of information for future generations to study the ancient history of my country. Later, Sima Zhen in the Tang Dynasty compiled 13 volumes of "Historical Records Suoyin", and Zhang Shoujie in the Tang Dynasty compiled 30 volumes of "Historical Records Zhengyi". Later generations collectively called these three annotations "Shiji Sanjia Annotations". "Historical Records" is the first large-scale comprehensive annotation since the publication of "Historical Records". Pei Peng's name will also be passed down through the ages with "Historical Records", which is "historian's swan song". Pei Ziye is the great-grandson of Pei Songzhi, the grandson of Pei Xiang, and a famous historian. He is good at literature, especially history. His great-grandfather Pei Songzhi had planned to continue the revision of He Chengtian's "National History" (i.e., the History of the Song Dynasty in the Southern Dynasties), but he died before he could write it. Pei Ziye was determined to inherit his great-grandfather's legacy and complete the "Book of the Song Dynasty". But at this time, "History of the Song Dynasty" written by Shen Yue in the last years of Qi Yongming had been published in the world. Therefore, Pei Ziye deleted and compiled "History of the Song Dynasty" into a "Song Brief" based on his own views and the historical materials he had mastered, with a total of 20 volumes. "Song Lue" surpassed "Song Shu" in terms of narrative and commentary, which made Shen Yue sigh. "Song Lue" was well received by people as soon as it was published. In short, in the field of historiography of the Southern and Northern Dynasties, Pei Song's ancestors and grandsons each enriched the motherland's historical treasure house with their immortal masterpieces and made great contributions to the development of Chinese historiography.