Chen Yinque's speech, ten thousand copies of "Notes on the History of Wei, Jin, Southern and Northern Dynasties"; Tian Yuqing's exploration of Tuoba history: Zhou Yiliang's "Twelve Lectures on the History of Wei, Jin, Southern and Northern Dynasties", we can have a general idea just by looking at these three people.
If you want to be popular, there is "Those Things in the Northern and Southern Dynasties". Others look at personal interests, whether reading agricultural books or looking at the economy or the civil service system.