The Secret of Liang Hongda History: Why didn't there be a general in the Northern Song Dynasty and a photograph in the Southern Song Dynasty?

No general in the Northern Song Dynasty said that there were few famous soldiers in the Northern Song Dynasty, except for a few famous soldiers who founded the country. It was replaced by Kou Zhun, Fan Zhongyan and Wang Anshi. What Wu Xiang said in the Southern Song Dynasty was that most of the civil servants in the Southern Song Dynasty were treacherous officials, and there were few decent prime ministers in the Southern Song Dynasty, such as Qin Gui, Jia Sidao and Huang Qian Shan. However, there were many famous soldiers in the Southern Song Dynasty, such as Yue Fei and Han Shizhong, and Sanjie, Meng Gong and Yu Jie at the end of the Song Dynasty.